Jef Mathiot is a user on mastodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
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This discussion yesterday about whether or not toots in French (and other non-English languages) should make their way to the federated timeline reminded me this blog post by Salvatore Sanfilippo aka Antirez (the creator of Redis, which is one of the core components propelling Mastodon).
"English has been my pain for 15 years"
http://antirez.com/news/61
All the grammatical or spelling errors in the previous toot are provided for free.