SMOOTHER: This language is very important for many people in Japan, in particular in themany work's woring fields.

For me is so difficult to learn the language, any types of themany foreign language.

This language is very important, in particular in the work'sld of worldk.

"the work's world" wouldn't be said grammatically, as work is uncountable so doesn't take a "the"

Even at that, "work's world" sounds unnatural - "world of work" is a common idiomatic phrase that gets used and would be expected to be used here, even if by basic grammar rules they are equivalent.

For me is sot is very difficult to learn the language, any types of them.language

"so" isn't a generic emphasis word, it has specific patterns where it can be used (e.g. "so X that I Y").

However I'm very good inat math and scientific subjects.

"in" is acceptable grammatically, but "at" is much more natural for this context.

This language is very important, in particular in the work's -world.

For me is soI find it difficult to learn thenew languages, any types of themespecially English.

However, I'm very good in math and the scientific subjectces.

This language is very important, in particular in the work's world.

I would say "in a workplace setting."

For me it's so difficult to learn the language, any types of them.

However I'm very good in mat Math and scientific subjects.