Help, I don't know what is happening!

I have an info product in the local language. Let's say Product A. I am selling it in a specific state of India. I got pretty good sales with it. Approximately 200 sales and I am getting daily 15-20 sales. I am promoting it through FB ads. I set up a custom conversion. For this product, I got sales from day1.

Then I created the same product in English and trying to sell it throughout India. Let's say it's Product B

I created a custom conversion 2 for this product. Then started a campaign with two different audiences. One is a lookalike audience of people who brought Product A. and the second is a custom audience same as Product A but the location is the whole India. After two days Lookalike audience getting more reach, clicks, and budget allocation so I stopped the custom audience ad set and kept lookalike. Now after 7 days. I have only 1 sale, 21 clicks, and 904 reach.

So why this is happening?
Compared to Product A campaign this campaign is not working!

So the first campaign was in the local language and constrained to a specific state of India. The second campaign was in English and throughout India. These changes could be the issue.

I agree. Must be related to the local and English language change. Location also affects. Are there any specific characteristics of your audience throughout India, besides language? If yes try doing custom audience campaign with those new characteristics and not the identical campaign to product A (where you had local language and specific part of India)

Too many factors
We can't give solutions without knowing the...
It can be
The product
The pricing
The landing page
The people you target