fix: Passing language as acronym to Whisper generate (#23141)

* add fix

* address comments

* remove error formatting

tests/models/whisper/test_modeling_whisper.py

@@ -414,6 +414,21 @@ class WhisperModelTest(ModelTesterMixin, GenerationTesterMixin, PipelineTesterMi
         model.generate(input_features)
         model.generate(input_features, num_beams=4, do_sample=True, early_stopping=False, num_return_sequences=3)
 
+    def test_generate_language(self):
+        config, input_dict = self.model_tester.prepare_config_and_inputs()
+        input_features = input_dict["input_features"]
+        model = WhisperForConditionalGeneration(config).to(torch_device)
+        # Hack to keep the test fast and not require downloading a model with a generation_config
+        model.generation_config.__setattr__("lang_to_id", {"<|en|>": 1})
+        model.generation_config.__setattr__("task_to_id", {"transcribe": 2})
+
+        # test language code
+        model.generate(input_features, language="en")
+        # test tokenizer code
+        model.generate(input_features, language="<|en|>")
+        # test language name
+        model.generate(input_features, language="English")
+
     def test_forward_signature(self):
         config, _ = self.model_tester.prepare_config_and_inputs_for_common()