Once you have installed WordPress in your own language, Jetpack will automatically switch to your language, as long as a translation file is available.
If you find untranslated strings, you can help by suggesting new translations in WordPress’s collaborative translation too, GlotPress. All you need is a WordPress.org account to log in and start contributing!
GlotPress validators will have a look at your suggestions, and approve or change them if necessary. Once your translations have been approved, they will be shipped to everyone using WordPress in your language. Thanks for your contribution!
I found a missing translation, but I can’t find the string in GlotPress
Some Jetpack features, such as Comments, Subscriptions, and Likes, are hosted on WordPress.com. If you’re not seeing a string on the Jetpack translation page linked above, you will have to look in the WordPress.com GlotPress project to find the strings to translate.
If you have more questions about Jetpack translations, do not hesitate to contact us!
Thanks a lot for helping us fly Jetpack around the world.