[Cerrado] Delete all translation strings

Background of the issue:
I am trying to improve site speed on my website enlace oculto. I am considering deleting all translation strings in the backend as a method to achieve this.

Symptoms:
No specific issue or error message mentioned.

Questions:
Could you maybe advise me what can I do to improve site speed?
I have found this method: https://wpml.org/forums/topic/how-can-i-or-shall-i-delete-all-translation-strings-in-the-backend/. Please comment on this method.