Que tal!! aaa7

Utilizando la opción buscar encuentras la respuesta fácilmente, debes de flashear con un FS que tenga el idioma deseado en este caso si quieres inglés puedes flashear practicamente con cualquier FS.
BALTIC:
English, Estonian, Lithuanian, Latvian, Russian

HONG_KONG:
English, Chinese (in Hong Kong)
NORDIC:
English, Albanian, Arabic, Croatian, Danish, Finnish, Icelandic, Norwegian, Swedish, Turkish
WESTERN-EUROPE:
English, Dutch, French, Portuguese, Spanish, Turkish, Polish
ADRIATIC:
English, Albanian, Bulgarian, Croatian, French, German, Greek, Italian, Romanian, Russian
AMERICA:
English for American, Portuguese for Brazil, French for Canada, Spanish for Latin American, Dutch, French, Spanish
APAC-ANZ:
English, Dutch, German, French, Indonesian, Malaysian, Filipino, Vietnamese, Simplified Chinese
C-ASIA:
English, Arabic, Farsi (spoken in Iran), Russian, Turkish, Ukrainian
RUSSIA:
English, Russian
CENTRAL-EUROPE:
English, Croatian, German, Czech, Hungarian, Polish, Serbian, Slovak, Slovenian
FRANCE:
English, French
ISRAEL:
English, Russian, Hebrew
S-E-EUROPE:
English, Albanian, Bulgarian, Croatian, Greek, Hungarian, Macedonian, Romanian, Russian, Serbian
S-ASIA-LEVAN:
English, Farsi (spoken in Iran), French, Filipino, Hebrew, Hindi, Russian
S-CENTR-AFR:
English, Dutch, Farsi (spoken in Iran), German, Sesotho (South Africa), Zulu (African), Portuguese
TAIWAN:
English, Chinese for Taiwan
El CDA puedes poner uno generico no hay problema alguno, en el CDA se encuentra la personalizacion del teléfono como sonidos, imágenes, skins no a menos que los temas de dicho CDA traigan incorporado skin.