Verifying Pitch translation - Bussines English from Polish (already translated by me to English)

I am looking for a person who can help me with verifying the translation of my startup Pitch. Pitch is already translated from Polish to English, but I am sending a Polish version as well to check the origin of the translation. Mostly preferable for a person who knows the Polish language and would be able to verify the origin.

About Pitch:
The current translation is not bad, but I am not a specialist in business English.
It is made of 20 slides,
In total it is around 1500 words.

I would like to have it done by 18-19.08.2021