The menu language on reMarkable is English.
The handwriting conversion feature currently supports the following languages:
Basque, Bulgarian, Catalan, Croatian, Czech, Danish, Dutch, English (Canada), English (United Kingdom), English (United States), Estonian, Finnish, French (Canada), French (France), Galician, German (Austria), German (Germany), Greek, Hungarian, Icelandic, Irish, Italian, Latvian, Lithuanian, Norwegian, Polish, Portuguese, Romanian, Slovak, Slovenia, Spanish and Swedish.
We support 17 keyboard languages, including French, German, Italian, and Spanish. Select your keyboard language in Language settings.