The old adage is true: pictures are often worth one thousand words.
If your English is not so good, bring samples, pictures, graphs or charts to meetings. They will help people understand you. If listeners cannot follow your words, at least they will remember your examples.
Also, some people absorb visual information better so showing something instead of explaining it will help you transmit your message.
Have a look at Andrew’s book on how to improve your business English: https://lnkd.in/d6MV4Yme