How to add special tokens to a pretrained model?

Beginners
1

Hi,

I am following this tutorial: notebooks/language_modeling.ipynb at master · huggingface/notebooks · GitHub

However, I am wondering, how do I add special characters to the tokenizer?

For example, accents such as the following: é, à, è, ù, â, ê, î, ô, û, etc.

Thanks.