Can you change English games to Japanese?
Most Nintendo DS games start off in their original language and are then either translated and marketed officially by Nintendo, or hacked and subbed by bilingual fans. Although the Nintendo DS itself has a switch-language function, the games you play on it would need to be purchased from a Japanese vendor, imported, or fansubbed for you to get them in Japanese.
Will the dialogue or speech of a Japanese PS3 game of an American PS3 title be in the English or Japanese language?
If you have a Japanese Nintendo DS game and you speak and read English will the language convert if English is the selected language?
Depending on the game, the fan community might have released a custom patch to change the language. Otherwise, no. The reason Japanese games take time to come to the West is due to the need for the language to be translated and localised - they just don't tend to have English already programmed into them.
It depends on the game. If the game is in English, it will say so on the cover. However, if it is sold in Japan with an intended Japanese market, it will usually be in Japanese. You may be lucky enough to find an English game in Japan, but the reason for it being in English may be that the same product is exported overseas.
VOCALOID: LEON-English LOLA-English MIRIAM-English MEIKO-Japanese KAITO-Japanese VOCALOID2: Sweet ANN-English Hatsune Miku-Japanese Kagamine Rin/Len-Japanese Prima-English (Italian and German in opera) ACT2-Japanese Gackpoid-Japanese Megurine Luka-English and Japanese Megpoid-English SONiKA-English and Multilingual SF-A2-Japanese Kaai Yuki-Japanese Kiyoteru Hiyama-Japanese Big AL-English Miku Append-Japanese Tonio-English (Italian and German in opera) Lily-Japanese VY1-Japanese Gachapoid-Japanese Nekomura Iroha-Japanese Utatane Piko-Japanese Kagamine Append-Japanese VY2-Japanese VOCALOID3: Mew-Japanese Seeu-Korean and Japanese(and an upcoming English) Megpoid V3-Japanese VY1V3-Japanese Tone Rion-Japanese OLIVER-English CUL-Japanese Yuzuki Yukari-Japanese Bruno-Spanish Clara-Spanish IA-Japanese Megpoid…
No. PS2 is region-locked, which means if you have a Japanese PS2, it cannot play English PS2 games and vice versa. There is a way to play Japanese games on English PS2 using a disc and switching out the disc with the game, however it is sold separately. This disc is called Swap Magic if you ever want to research it.