Where can I find a french ‘penpal’ on the internet?
Also, look at previous similar questions that were already answered in the past on Yahoo Answers.
In your search engine, also try with the British word “penfriend”, more used worldwide than “penpal”. For instance if you look up the words “international penfriends” you should find a lot of websites. Careful, some of them require a payment, on others you can post your ad for free. Bonne chance!