I've started with A Link To The Past, not too much text to translate, i just searched on a dictionary every single word trying to understand the most i could of every single sentence. Then i passed to Secret of Mana, and more text heavy games like Breath of Fire 2 and Final Fantasy VI... Soon i had no problems understanding almost everything, only downside was i became the official translator for my friends when they were playing rpgs they couldn't understand ^^