diff --git a/docs/source/custom_datasets.rst b/docs/source/custom_datasets.rst
index fd8b05aaee..c9fe228792 100644
--- a/docs/source/custom_datasets.rst
+++ b/docs/source/custom_datasets.rst
@@ -324,7 +324,7 @@ which we'll use in a moment:
     id2tag = {id: tag for tag, id in tag2id.items()}
 
 To encode the tokens, we'll use a pre-trained DistilBert tokenizer. We can tell the tokenizer that we're dealing
-with ready-split tokens rather than full sentence strings by passing ``is_pretokenized=True``. We'll also pass
+with ready-split tokens rather than full sentence strings by passing ``is_split_into_words=True``. We'll also pass
 ``padding=True`` and ``truncation=True`` to pad the sequences to be the same length. Lastly, we can tell the model
 to return information about the tokens which are split by the wordpiece tokenization process, which we will need in
 a moment.
@@ -333,8 +333,8 @@ a moment.
 
     from transformers import DistilBertTokenizerFast
     tokenizer = DistilBertTokenizerFast.from_pretrained('distilbert-base-cased')
-    train_encodings = tokenizer(train_texts, is_pretokenized=True, return_offsets_mapping=True, padding=True, truncation=True)
-    val_encodings = tokenizer(val_texts, is_pretokenized=True, return_offsets_mapping=True, padding=True, truncation=True)
+    train_encodings = tokenizer(train_texts, is_split_into_words=True, return_offsets_mapping=True, padding=True, truncation=True)
+    val_encodings = tokenizer(val_texts, is_split_into_words=True, return_offsets_mapping=True, padding=True, truncation=True)
 
 Great, so now our tokens are nicely encoded in the format that they need to be in to feed them into our DistilBert
 model below.
diff --git a/docs/source/preprocessing.rst b/docs/source/preprocessing.rst
index 76eade2f4d..c5bc19c94b 100644
--- a/docs/source/preprocessing.rst
+++ b/docs/source/preprocessing.rst
@@ -290,12 +290,12 @@ predictions in `named entity recognition (NER) <https://en.wikipedia.org/wiki/Na
     if that was the case) but just split into words (which is often the first step in subword tokenization algorithms
     like BPE).
 
-If you want to use pre-tokenized inputs, just set :obj:`is_pretokenized=True` when passing your inputs to the
+If you want to use pre-tokenized inputs, just set :obj:`is_split_into_words=True` when passing your inputs to the
 tokenizer. For instance, we have:
 
 .. code-block::
 
-    >>> encoded_input = tokenizer(["Hello", "I'm", "a", "single", "sentence"], is_pretokenized=True)
+    >>> encoded_input = tokenizer(["Hello", "I'm", "a", "single", "sentence"], is_split_into_words=True)
     >>> print(encoded_input)
     {'input_ids': [101, 8667, 146, 112, 182, 170, 1423, 5650, 102],
      'token_type_ids': [0, 0, 0, 0, 0, 0, 0, 0, 0], 
@@ -312,7 +312,7 @@ like this:
     batch_sentences = [["Hello", "I'm", "a", "single", "sentence"],
                        ["And", "another", "sentence"],
                        ["And", "the", "very", "very", "last", "one"]]
-    encoded_inputs = tokenizer(batch_sentences, is_pretokenized=True)
+    encoded_inputs = tokenizer(batch_sentences, is_split_into_words=True)
 
 or a batch of pair sentences like this:
 
@@ -321,7 +321,7 @@ or a batch of pair sentences like this:
     batch_of_second_sentences = [["I'm", "a", "sentence", "that", "goes", "with", "the", "first", "sentence"],
                                  ["And", "I", "should", "be", "encoded", "with", "the", "second", "sentence"],
                                  ["And", "I", "go", "with", "the", "very", "last", "one"]]
-    encoded_inputs = tokenizer(batch_sentences, batch_of_second_sentences, is_pretokenized=True)
+    encoded_inputs = tokenizer(batch_sentences, batch_of_second_sentences, is_split_into_words=True)
 
 And you can add padding, truncation as well as directly return tensors like before:
 
@@ -330,14 +330,14 @@ And you can add padding, truncation as well as directly return tensors like befo
     ## PYTORCH CODE
     batch = tokenizer(batch_sentences,
                       batch_of_second_sentences,
-                      is_pretokenized=True,
+                      is_split_into_words=True,
                       padding=True,
                       truncation=True,
                       return_tensors="pt")
     ## TENSORFLOW CODE
     batch = tokenizer(batch_sentences,
                       batch_of_second_sentences,
-                      is_pretokenized=True,
+                      is_split_into_words=True,
                       padding=True,
                       truncation=True,
                       return_tensors="tf")
diff --git a/src/transformers/tokenization_gpt2.py b/src/transformers/tokenization_gpt2.py
index fbe9817de0..dbe9899dc5 100644
--- a/src/transformers/tokenization_gpt2.py
+++ b/src/transformers/tokenization_gpt2.py
@@ -17,6 +17,7 @@
 
 import json
 import os
+import warnings
 from functools import lru_cache
 
 import regex as re
@@ -121,7 +122,7 @@ class GPT2Tokenizer(PreTrainedTokenizer):
 
     .. note::
 
-        When used with ``is_pretokenized=True``, this tokenizer will add a space before each word (even the first one).
+        When used with ``is_split_into_words=True``, this tokenizer will add a space before each word (even the first one).
 
     This tokenizer inherits from :class:`~transformers.PreTrainedTokenizer` which contains most of the methods. Users
     should refer to the superclass for more information regarding methods.
@@ -288,9 +289,16 @@ class GPT2Tokenizer(PreTrainedTokenizer):
 
         return vocab_file, merge_file
 
-    def prepare_for_tokenization(self, text, is_pretokenized=False, **kwargs):
+    def prepare_for_tokenization(self, text, is_split_into_words=False, **kwargs):
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
+
         add_prefix_space = kwargs.pop("add_prefix_space", self.add_prefix_space)
-        if is_pretokenized or add_prefix_space:
+        if is_split_into_words or add_prefix_space:
             text = " " + text
         return (text, kwargs)
 
@@ -317,7 +325,7 @@ class GPT2TokenizerFast(PreTrainedTokenizerFast):
 
     .. note::
 
-        When used with ``is_pretokenized=True``, this tokenizer needs to be instantiated with
+        When used with ``is_split_into_words=True``, this tokenizer needs to be instantiated with
         ``add_prefix_space=True``.
 
     This tokenizer inherits from :class:`~transformers.PreTrainedTokenizer` which contains most of the methods. Users
@@ -377,9 +385,15 @@ class GPT2TokenizerFast(PreTrainedTokenizerFast):
         self.add_prefix_space = add_prefix_space
 
     def _batch_encode_plus(self, *args, **kwargs) -> BatchEncoding:
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
 
-        is_pretokenized = kwargs.get("is_pretokenized", False)
-        assert self.add_prefix_space or not is_pretokenized, (
+        is_split_into_words = kwargs.get("is_split_into_words", False)
+        assert self.add_prefix_space or not is_split_into_words, (
             f"You need to instantiate {self.__class__.__name__} with add_prefix_space=True "
             "to use it with pretokenized inputs."
         )
@@ -387,9 +401,15 @@ class GPT2TokenizerFast(PreTrainedTokenizerFast):
         return super()._batch_encode_plus(*args, **kwargs)
 
     def _encode_plus(self, *args, **kwargs) -> BatchEncoding:
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
 
-        is_pretokenized = kwargs.get("is_pretokenized", False)
-        assert self.add_prefix_space or not is_pretokenized, (
+        is_split_into_words = kwargs.get("is_split_into_words", False)
+        assert self.add_prefix_space or not is_split_into_words, (
             f"You need to instantiate {self.__class__.__name__} with add_prefix_space=True "
             "to use it with pretokenized inputs."
         )
diff --git a/src/transformers/tokenization_roberta.py b/src/transformers/tokenization_roberta.py
index 6559bd9782..2601e21536 100644
--- a/src/transformers/tokenization_roberta.py
+++ b/src/transformers/tokenization_roberta.py
@@ -14,7 +14,7 @@
 # limitations under the License.
 """Tokenization classes for RoBERTa."""
 
-
+import warnings
 from typing import List, Optional
 
 from tokenizers.processors import RobertaProcessing
@@ -81,7 +81,7 @@ class RobertaTokenizer(GPT2Tokenizer):
 
     .. note::
 
-        When used with ``is_pretokenized=True``, this tokenizer will add a space before each word (even the first one).
+        When used with ``is_split_into_words=True``, this tokenizer will add a space before each word (even the first one).
 
     This tokenizer inherits from :class:`~transformers.PreTrainedTokenizer` which contains most of the methods. Users
     should refer to the superclass for more information regarding methods.
@@ -251,9 +251,16 @@ class RobertaTokenizer(GPT2Tokenizer):
             return len(cls + token_ids_0 + sep) * [0]
         return len(cls + token_ids_0 + sep + sep + token_ids_1 + sep) * [0]
 
-    def prepare_for_tokenization(self, text, is_pretokenized=False, **kwargs):
+    def prepare_for_tokenization(self, text, is_split_into_words=False, **kwargs):
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
+
         add_prefix_space = kwargs.pop("add_prefix_space", self.add_prefix_space)
-        if (is_pretokenized or add_prefix_space) and (len(text) > 0 and not text[0].isspace()):
+        if (is_split_into_words or add_prefix_space) and (len(text) > 0 and not text[0].isspace()):
             text = " " + text
         return (text, kwargs)
 
@@ -280,7 +287,7 @@ class RobertaTokenizerFast(GPT2TokenizerFast):
 
     .. note::
 
-        When used with ``is_pretokenized=True``, this tokenizer needs to be instantiated with
+        When used with ``is_split_into_words=True``, this tokenizer needs to be instantiated with
         ``add_prefix_space=True``.
 
     This tokenizer inherits from :class:`~transformers.PreTrainedTokenizerFast` which contains most of the methods. Users
diff --git a/src/transformers/tokenization_utils.py b/src/transformers/tokenization_utils.py
index b19fd90e32..17291ff641 100644
--- a/src/transformers/tokenization_utils.py
+++ b/src/transformers/tokenization_utils.py
@@ -19,6 +19,7 @@
 import itertools
 import re
 import unicodedata
+import warnings
 from typing import Any, Dict, List, Optional, Tuple, Union, overload
 
 from .file_utils import add_end_docstrings
@@ -250,6 +251,12 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
         Returns:
             :obj:`List[str]`: The list of tokens.
         """
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            kwargs["is_split_into_words"] = kwargs.pop("is_pretokenized")
         # Simple mapping string => AddedToken for special tokens with specific tokenization behaviors
         all_special_tokens_extended = dict(
             (str(t), t) for t in self.all_special_tokens_extended if isinstance(t, AddedToken)
@@ -402,7 +409,7 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
         truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -419,17 +426,19 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
                 tokens = self.tokenize(text, **kwargs)
                 return self.convert_tokens_to_ids(tokens)
             elif isinstance(text, (list, tuple)) and len(text) > 0 and isinstance(text[0], str):
-                if is_pretokenized:
-                    tokens = list(itertools.chain(*(self.tokenize(t, is_pretokenized=True, **kwargs) for t in text)))
+                if is_split_into_words:
+                    tokens = list(
+                        itertools.chain(*(self.tokenize(t, is_split_into_words=True, **kwargs) for t in text))
+                    )
                     return self.convert_tokens_to_ids(tokens)
                 else:
                     return self.convert_tokens_to_ids(text)
             elif isinstance(text, (list, tuple)) and len(text) > 0 and isinstance(text[0], int):
                 return text
             else:
-                if is_pretokenized:
+                if is_split_into_words:
                     raise ValueError(
-                        f"Input {text} is not valid. Should be a string or a list/tuple of strings when `is_pretokenized=True`."
+                        f"Input {text} is not valid. Should be a string or a list/tuple of strings when `is_split_into_words=True`."
                     )
                 else:
                     raise ValueError(
@@ -445,6 +454,13 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
                 "https://github.com/huggingface/transformers/pull/2674"
             )
 
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
+
         first_ids = get_input_ids(text)
         second_ids = get_input_ids(text_pair) if text_pair is not None else None
 
@@ -482,7 +498,7 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
         truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -499,8 +515,10 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
                 tokens = self.tokenize(text, **kwargs)
                 return self.convert_tokens_to_ids(tokens)
             elif isinstance(text, (list, tuple)) and len(text) > 0 and isinstance(text[0], str):
-                if is_pretokenized:
-                    tokens = list(itertools.chain(*(self.tokenize(t, is_pretokenized=True, **kwargs) for t in text)))
+                if is_split_into_words:
+                    tokens = list(
+                        itertools.chain(*(self.tokenize(t, is_split_into_words=True, **kwargs) for t in text))
+                    )
                     return self.convert_tokens_to_ids(tokens)
                 else:
                     return self.convert_tokens_to_ids(text)
@@ -518,11 +536,18 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
                 "transformers.PreTrainedTokenizerFast."
             )
 
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
+
         input_ids = []
         for ids_or_pair_ids in batch_text_or_text_pairs:
             if not isinstance(ids_or_pair_ids, (list, tuple)):
                 ids, pair_ids = ids_or_pair_ids, None
-            elif is_pretokenized and not isinstance(ids_or_pair_ids[0], (list, tuple)):
+            elif is_split_into_words and not isinstance(ids_or_pair_ids[0], (list, tuple)):
                 ids, pair_ids = ids_or_pair_ids, None
             else:
                 ids, pair_ids = ids_or_pair_ids
@@ -616,7 +641,7 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
         return batch_outputs
 
     def prepare_for_tokenization(
-        self, text: str, is_pretokenized: bool = False, **kwargs
+        self, text: str, is_split_into_words: bool = False, **kwargs
     ) -> Tuple[str, Dict[str, Any]]:
         """
         Performs any necessary transformations before tokenization.
@@ -627,7 +652,7 @@ class PreTrainedTokenizer(PreTrainedTokenizerBase):
         Args:
             test (:obj:`str`):
                 The text to prepare.
-            is_pretokenized (:obj:`bool`, `optional`, defaults to :obj:`False`):
+            is_split_into_words (:obj:`bool`, `optional`, defaults to :obj:`False`):
                 Whether or not the text has been pretokenized.
             kwargs:
                 Keyword arguments to use for the tokenization.
diff --git a/src/transformers/tokenization_utils_base.py b/src/transformers/tokenization_utils_base.py
index 54adcad75a..7213abc255 100644
--- a/src/transformers/tokenization_utils_base.py
+++ b/src/transformers/tokenization_utils_base.py
@@ -1088,7 +1088,7 @@ ENCODE_KWARGS_DOCSTRING = r"""
                 :obj:`return_overflowing_tokens=True` will contain some tokens from the end of the truncated sequence
                 returned to provide some overlap between truncated and overflowing sequences. The value of this
                 argument defines the number of overlapping tokens.
-            is_pretokenized (:obj:`bool`, `optional`, defaults to :obj:`False`):
+            is_split_into_words (:obj:`bool`, `optional`, defaults to :obj:`False`):
                 Whether or not the input is already pre-tokenized (e.g., split into words), in which case the tokenizer
                 will skip the pre-tokenization step. This is useful for NER or token classification.
             pad_to_multiple_of (:obj:`int`, `optional`):
@@ -1863,7 +1863,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
         truncation: Union[bool, str, TruncationStrategy] = False,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -1884,12 +1884,12 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
                 The sequence or batch of sequences to be encoded.
                 Each sequence can be a string or a list of strings (pretokenized string).
                 If the sequences are provided as list of strings (pretokenized), you must set
-                :obj:`is_pretokenized=True` (to lift the ambiguity with a batch of sequences).
+                :obj:`is_split_into_words=True` (to lift the ambiguity with a batch of sequences).
             text_pair (:obj:`str`, :obj:`List[str]`, :obj:`List[List[str]]`):
                 The sequence or batch of sequences to be encoded.
                 Each sequence can be a string or a list of strings (pretokenized string).
                 If the sequences are provided as list of strings (pretokenized), you must set
-                :obj:`is_pretokenized=True` (to lift the ambiguity with a batch of sequences).
+                :obj:`is_split_into_words=True` (to lift the ambiguity with a batch of sequences).
         """
         # Input type checking for clearer error
         assert isinstance(text, str) or (
@@ -1928,8 +1928,10 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
         )
 
         is_batched = bool(
-            (not is_pretokenized and isinstance(text, (list, tuple)))
-            or (is_pretokenized and isinstance(text, (list, tuple)) and text and isinstance(text[0], (list, tuple)))
+            (not is_split_into_words and isinstance(text, (list, tuple)))
+            or (
+                is_split_into_words and isinstance(text, (list, tuple)) and text and isinstance(text[0], (list, tuple))
+            )
         )
 
         if is_batched:
@@ -1941,7 +1943,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
                 truncation=truncation,
                 max_length=max_length,
                 stride=stride,
-                is_pretokenized=is_pretokenized,
+                is_split_into_words=is_split_into_words,
                 pad_to_multiple_of=pad_to_multiple_of,
                 return_tensors=return_tensors,
                 return_token_type_ids=return_token_type_ids,
@@ -1962,7 +1964,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
                 truncation=truncation,
                 max_length=max_length,
                 stride=stride,
-                is_pretokenized=is_pretokenized,
+                is_split_into_words=is_split_into_words,
                 pad_to_multiple_of=pad_to_multiple_of,
                 return_tensors=return_tensors,
                 return_token_type_ids=return_token_type_ids,
@@ -1985,7 +1987,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
         truncation: Union[bool, str, TruncationStrategy] = False,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -2032,7 +2034,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
             truncation_strategy=truncation_strategy,
             max_length=max_length,
             stride=stride,
-            is_pretokenized=is_pretokenized,
+            is_split_into_words=is_split_into_words,
             pad_to_multiple_of=pad_to_multiple_of,
             return_tensors=return_tensors,
             return_token_type_ids=return_token_type_ids,
@@ -2054,7 +2056,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
         truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -2084,7 +2086,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
         truncation: Union[bool, str, TruncationStrategy] = False,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -2126,7 +2128,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
             truncation_strategy=truncation_strategy,
             max_length=max_length,
             stride=stride,
-            is_pretokenized=is_pretokenized,
+            is_split_into_words=is_split_into_words,
             pad_to_multiple_of=pad_to_multiple_of,
             return_tensors=return_tensors,
             return_token_type_ids=return_token_type_ids,
@@ -2154,7 +2156,7 @@ class PreTrainedTokenizerBase(SpecialTokensMixin):
         truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[Union[str, TensorType]] = None,
         return_token_type_ids: Optional[bool] = None,
diff --git a/src/transformers/tokenization_utils_fast.py b/src/transformers/tokenization_utils_fast.py
index 2ddae67a2f..c357e00c74 100644
--- a/src/transformers/tokenization_utils_fast.py
+++ b/src/transformers/tokenization_utils_fast.py
@@ -17,6 +17,7 @@
 """
 
 import os
+import warnings
 from collections import defaultdict
 from typing import Any, Dict, List, Optional, Tuple, Union
 
@@ -328,7 +329,7 @@ class PreTrainedTokenizerFast(PreTrainedTokenizerBase):
         truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[str] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -346,6 +347,13 @@ class PreTrainedTokenizerFast(PreTrainedTokenizerBase):
                 "batch_text_or_text_pairs has to be a list (got {})".format(type(batch_text_or_text_pairs))
             )
 
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
+
         if kwargs:
             raise ValueError(f"Keyword arguments {kwargs} not recognized.")
 
@@ -365,19 +373,21 @@ class PreTrainedTokenizerFast(PreTrainedTokenizerBase):
                 encodings = self._tokenizer.encode(
                     *batch_text_or_text_pairs[0],
                     add_special_tokens=add_special_tokens,
-                    is_pretokenized=is_pretokenized,
+                    is_pretokenized=is_split_into_words,
                 )
             else:
                 # We got a single sequence
                 encodings = self._tokenizer.encode(
                     batch_text_or_text_pairs[0],
                     add_special_tokens=add_special_tokens,
-                    is_pretokenized=is_pretokenized,
+                    is_pretokenized=is_split_into_words,
                 )
             encodings = [encodings]
         else:
             encodings = self._tokenizer.encode_batch(
-                batch_text_or_text_pairs, add_special_tokens=add_special_tokens, is_pretokenized=is_pretokenized
+                batch_text_or_text_pairs,
+                add_special_tokens=add_special_tokens,
+                is_pretokenized=is_split_into_words,
             )
 
         # Convert encoding to dict
@@ -423,7 +433,7 @@ class PreTrainedTokenizerFast(PreTrainedTokenizerBase):
         truncation_strategy: TruncationStrategy = TruncationStrategy.DO_NOT_TRUNCATE,
         max_length: Optional[int] = None,
         stride: int = 0,
-        is_pretokenized: bool = False,
+        is_split_into_words: bool = False,
         pad_to_multiple_of: Optional[int] = None,
         return_tensors: Optional[bool] = None,
         return_token_type_ids: Optional[bool] = None,
@@ -435,11 +445,17 @@ class PreTrainedTokenizerFast(PreTrainedTokenizerBase):
         verbose: bool = True,
         **kwargs
     ) -> BatchEncoding:
+        if "is_pretokenized" in kwargs:
+            warnings.warn(
+                "`is_pretokenized` is deprecated and will be removed in a future version, use `is_split_into_words` instead.",
+                FutureWarning,
+            )
+            is_split_into_words = kwargs.pop("is_pretokenized")
 
         batched_input = [(text, text_pair)] if text_pair else [text]
         batched_output = self._batch_encode_plus(
             batched_input,
-            is_pretokenized=is_pretokenized,
+            is_split_into_words=is_split_into_words,
             add_special_tokens=add_special_tokens,
             padding_strategy=padding_strategy,
             truncation_strategy=truncation_strategy,
diff --git a/tests/test_tokenization_common.py b/tests/test_tokenization_common.py
index 2972a80212..22d6e78024 100644
--- a/tests/test_tokenization_common.py
+++ b/tests/test_tokenization_common.py
@@ -743,7 +743,7 @@ class TokenizerTesterMixin:
     #             formatted_input = tokenizer.encode(sequence, add_special_tokens=True, add_prefix_space=False)
 
     #             self.assertEqual(
-    #                 tokenizer.encode(tokens, is_pretokenized=True, add_special_tokens=True), formatted_input
+    #                 tokenizer.encode(tokens, is_split_into_words=True, add_special_tokens=True), formatted_input
     #             )
     #             # This is not supported with the Rust tokenizers
     #             # self.assertEqual(tokenizer.encode(input_ids, add_special_tokens=True), formatted_input)
@@ -1250,20 +1250,20 @@ class TokenizerTesterMixin:
                 # sequence_no_prefix_space = sequence.strip()
 
                 # Test encode for pretokenized inputs
-                output = tokenizer.encode(token_sequence, is_pretokenized=True, add_special_tokens=False)
+                output = tokenizer.encode(token_sequence, is_split_into_words=True, add_special_tokens=False)
                 output_sequence = tokenizer.encode(sequence, add_special_tokens=False)
                 self.assertEqual(output, output_sequence)
 
-                output = tokenizer.encode(token_sequence, is_pretokenized=True, add_special_tokens=True)
+                output = tokenizer.encode(token_sequence, is_split_into_words=True, add_special_tokens=True)
                 output_sequence = tokenizer.encode(sequence, add_special_tokens=True)
                 self.assertEqual(output, output_sequence)
 
                 # Test encode_plus for pretokenized inputs
-                output = tokenizer.encode_plus(token_sequence, is_pretokenized=True, add_special_tokens=False)
+                output = tokenizer.encode_plus(token_sequence, is_split_into_words=True, add_special_tokens=False)
                 output_sequence = tokenizer.encode_plus(sequence, add_special_tokens=False)
                 for key in output.keys():
                     self.assertEqual(output[key], output_sequence[key])
-                output = tokenizer.encode_plus(token_sequence, is_pretokenized=True, add_special_tokens=True)
+                output = tokenizer.encode_plus(token_sequence, is_split_into_words=True, add_special_tokens=True)
                 output_sequence = tokenizer.encode_plus(sequence, add_special_tokens=True)
                 for key in output.keys():
                     self.assertEqual(output[key], output_sequence[key])
@@ -1274,7 +1274,7 @@ class TokenizerTesterMixin:
                 sequence_batch_cleaned_up_spaces = [" " + " ".join(s) for s in token_sequence_batch]
 
                 output = tokenizer.batch_encode_plus(
-                    token_sequence_batch, is_pretokenized=True, add_special_tokens=False
+                    token_sequence_batch, is_split_into_words=True, add_special_tokens=False
                 )
                 output_sequence = tokenizer.batch_encode_plus(
                     sequence_batch_cleaned_up_spaces, add_special_tokens=False
@@ -1282,7 +1282,7 @@ class TokenizerTesterMixin:
                 for key in output.keys():
                     self.assertEqual(output[key], output_sequence[key])
                 output = tokenizer.batch_encode_plus(
-                    token_sequence_batch, is_pretokenized=True, add_special_tokens=True
+                    token_sequence_batch, is_split_into_words=True, add_special_tokens=True
                 )
                 output_sequence = tokenizer.batch_encode_plus(
                     sequence_batch_cleaned_up_spaces, add_special_tokens=True
@@ -1292,25 +1292,25 @@ class TokenizerTesterMixin:
 
                 # Test encode for pretokenized inputs pairs
                 output = tokenizer.encode(
-                    token_sequence, token_sequence, is_pretokenized=True, add_special_tokens=False
+                    token_sequence, token_sequence, is_split_into_words=True, add_special_tokens=False
                 )
                 output_sequence = tokenizer.encode(sequence, sequence, add_special_tokens=False)
                 self.assertEqual(output, output_sequence)
                 output = tokenizer.encode(
-                    token_sequence, token_sequence, is_pretokenized=True, add_special_tokens=True
+                    token_sequence, token_sequence, is_split_into_words=True, add_special_tokens=True
                 )
                 output_sequence = tokenizer.encode(sequence, sequence, add_special_tokens=True)
                 self.assertEqual(output, output_sequence)
 
                 # Test encode_plus for pretokenized inputs pairs
                 output = tokenizer.encode_plus(
-                    token_sequence, token_sequence, is_pretokenized=True, add_special_tokens=False
+                    token_sequence, token_sequence, is_split_into_words=True, add_special_tokens=False
                 )
                 output_sequence = tokenizer.encode_plus(sequence, sequence, add_special_tokens=False)
                 for key in output.keys():
                     self.assertEqual(output[key], output_sequence[key])
                 output = tokenizer.encode_plus(
-                    token_sequence, token_sequence, is_pretokenized=True, add_special_tokens=True
+                    token_sequence, token_sequence, is_split_into_words=True, add_special_tokens=True
                 )
                 output_sequence = tokenizer.encode_plus(sequence, sequence, add_special_tokens=True)
                 for key in output.keys():
@@ -1326,7 +1326,7 @@ class TokenizerTesterMixin:
                 ]
 
                 output = tokenizer.batch_encode_plus(
-                    token_sequence_pair_batch, is_pretokenized=True, add_special_tokens=False
+                    token_sequence_pair_batch, is_split_into_words=True, add_special_tokens=False
                 )
                 output_sequence = tokenizer.batch_encode_plus(
                     sequence_pair_batch_cleaned_up_spaces, add_special_tokens=False
@@ -1334,7 +1334,7 @@ class TokenizerTesterMixin:
                 for key in output.keys():
                     self.assertEqual(output[key], output_sequence[key])
                 output = tokenizer.batch_encode_plus(
-                    token_sequence_pair_batch, is_pretokenized=True, add_special_tokens=True
+                    token_sequence_pair_batch, is_split_into_words=True, add_special_tokens=True
                 )
                 output_sequence = tokenizer.batch_encode_plus(
                     sequence_pair_batch_cleaned_up_spaces, add_special_tokens=True
diff --git a/tests/test_tokenization_fast.py b/tests/test_tokenization_fast.py
index 0eb7b0dd70..1184a6c32f 100644
--- a/tests/test_tokenization_fast.py
+++ b/tests/test_tokenization_fast.py
@@ -340,12 +340,12 @@ class CommonFastTokenizerTest(unittest.TestCase):
         pretokenized_input_pair = "This is a sample pair".split()
 
         # Test encode for pretokenized inputs
-        output_r = tokenizer_r.encode(pretokenized_input_simple, is_pretokenized=True)
-        output_p = tokenizer_p.encode(pretokenized_input_simple, is_pretokenized=True)
+        output_r = tokenizer_r.encode(pretokenized_input_simple, is_split_into_words=True)
+        output_p = tokenizer_p.encode(pretokenized_input_simple, is_split_into_words=True)
         self.assertEqual(output_p, output_r)
 
         kwargs = {
-            "is_pretokenized": True,
+            "is_split_into_words": True,
             "return_token_type_ids": True,
             "return_attention_mask": True,
             "return_overflowing_tokens": False,
@@ -353,7 +353,7 @@ class CommonFastTokenizerTest(unittest.TestCase):
             "return_offsets_mapping": False,  # Not implemented in python tokenizers
         }
         batch_kwargs = {
-            "is_pretokenized": True,
+            "is_split_into_words": True,
             "return_token_type_ids": True,
             "return_attention_mask": True,  # we have an 's' here
             "return_overflowing_tokens": False,
@@ -374,8 +374,8 @@ class CommonFastTokenizerTest(unittest.TestCase):
             self.assertEqual(output_p[key], output_r[key])
 
         # Test encode for pretokenized inputs pairs
-        output_r = tokenizer_r.encode(pretokenized_input_simple, pretokenized_input_pair, is_pretokenized=True)
-        output_p = tokenizer_p.encode(pretokenized_input_simple, pretokenized_input_pair, is_pretokenized=True)
+        output_r = tokenizer_r.encode(pretokenized_input_simple, pretokenized_input_pair, is_split_into_words=True)
+        output_p = tokenizer_p.encode(pretokenized_input_simple, pretokenized_input_pair, is_split_into_words=True)
         self.assertEqual(output_p, output_r)
 
         # Test encode_plus for pretokenized inputs