How to translate customized string for specific langugage using Opensource utility

We have used v19.07.07 OpenWrt package and some of the customization was introduced.
We have also followed the translation steps mentioned in the below link. It uses poedit utility. But it's only translated upto 10 strings. Is there any other options or opensource utility available achieve ?

Specific Language such as Spanish and Portuguese.

How to apply language change to newly added menu in LuCI - #5 by chandraduraisamy