How good is your English.

You mean the sentence "How good is your English?"

I don't see anything wrong with that as it is. If you want to be more formal you could say "How proficient are you in English?" but the first sentence would be fine in most situations.

>>261151
can you provide some context for the sentence? It sounds like you're hiring someone but I'd hate to translate a sentence and incorrectly infer what you're trying to say

>>261151
The reason for my request is that I am looking to expand my network. Your skill and experience with software is in high demand with many of my OEM and Tier 1 clients.

>>261151
If you want to focus on brevity:

I ask because I'm looking to expand my network. Your skills and experience are in high demand with many of my clients.

>>261232
>>261388
>many of my
It's clear that he means "of my many clients" (I have lots of clients and they're all interested), not "many of my clients" (I have some number of clients, a largish proportion of which are interested).