Pokémon GO was first made available for mobile devices on July 6, 2016 with the option to play in English, Japanese, European French, German, Italian, and European Spanish. The 0.53.2 update on January 23, 2017 added Korean language support, and the 0.60.0 update added Traditional Chinese support.
Patch notes
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Added Brazilian Portuguese language support.
Tapping on a medal will now show your progress toward the next medal tier. ”