Momo is designed for Japanese language only. She does not have phonemes for other languages, though some can be improvised, but with rough results. Her voice data is written in Kana, so Western users must convert the filenames into Romaji first before using her. Despite being exclusively a Japanese voicebank, she can be somewhat forced to vocalize in English with decent results. Several iterations of voice upgrades have been released by her author, improving quality of her voice. Her voicebank was the precursor of the VCV (or renzokuon) standard, which later UTAUloids adopted.