API Document 
File Translation
User Dictionary
Others
Product
COUNT METHOD
Count Method
Language
Counting
English
One word as an unit
Japanese
Two characters as an unit
Chinese
One characters as an unit
Language
Counting
English
Japan → ONE word
Japanese
日本 → ONE word
Chinese
日本 → TWO words
Original Text
Counting
English alphabet
Hello RozettaAPI→16 characters
Japanese ＋ English alphabet
こんにちは ロゼッタAPI→13 characters