The Airmaster Q1 currently supports 22 languages:

ENG     =>        ENGLISH

BEL      =>        BELARUSIAN

BRA     =>        BRAZILIAN

CZE     =>        CZECH

DUT     =>        DUTCH

FRE     =>        FRENCH

GER     =>        GERMAN

GRE     =>        GREEK

ITA       =>        ITALIAN

JAP      =>        JAPANESE

KOR     =>        KOREAN

POL     =>        POLISH

POR     =>        PORTUGUESE

RUS     =>        RUSSIAN

SPA     =>        SPANISH

THA      =>        THAI

TUR      =>        TURKISH

UKR     =>        UKRAINIAN

USA     =>        AMERICAN

VIE       =>        VIETNAMESE

ZHS     =>        CHINESE_SIMPLIFIED

ZHT      =>        CHINESE_TRADITIONAL

The language selection can be made for the default user in P10.14, and individually for every other user by the ADMIN user in P09 in the user account settings.