Ask HN: Traffic drooped to 1/3rd after adding translation in 14 days

My site videodubber.ai had a healthy share of traffic with ranking of most pages between 10-20. I added spanish translations to the 33000 pages (mostly 'translate x_language video to y_language' landing pages) that we had and removed some textual content on July 7th.

Traffic dropped from 900 to 650 per day.

Then, I added some helpful content adding how my product can help translate one language to another on July 19th.

Traffic dropped to 350 from 600.

Now, I got the previous slim content back thinking that probably user intent was hit. Google crawled my pages on July 23rd.

I see further drops in traffic to 300.

What is happening seriously?

2-3 backlinks also got added in between.

Traffic continues to decline.

Ask me any additional details. I will provide.