I translate Firefox for iOS and Android, Thunderbird, Lightning, SeaMonkey and Thimble.
Grupyl10n:cs, l10n:translation, nda
Michal has been mainly focused on localization, where he is an integral team members. He also did a great job in 2016, attending two conferences, helping people on our booth and giving talks about L20n, Pontoon and localization in general. He already plans talks and workshops for coming events.
Translation and testing of Mozilla products in Czech