how to fulltext index both chinese and english characters together by using ngram parser in mysql 5.7?

Question

I have a table named 'comp' with a column 'compName', the compName contain different country's Characters, I am using mysql5.7 with ngram parser, now it is fine to search the Chinese word, but the it brings me the bad result when i searched English word. According to INFORMATION_SCHEMA.INNODB_FT_INDEX_CACHE table , i found it participle English word by the character, like: abc will be participled as ab,bc, But as we understand, the English will be participled as "SPACE", right ? So how to resolve this kinds of case when using ngram parser in mysql5.7.