I believe it's because the Japanese word for English is "Eigo", starting with an E. The iOS app's name is 「英語の瞬間翻訳トレーニング - Lala」 (Lala - Instant translation tra

I believe it's because the Japanese word for English is "Eigo", starting with an E. The iOS app's name is 「英語の瞬間翻訳トレーニング - Lala」 (Lala - Instant translation training for English), with "Eigo" as the first word.