Thanks for the answer, I already using Polylang for translation, I don’t want to add extra plugin just for this
Polylang and Loco Translate are different kind of plugins: The first translate your own content, the second the plugins’ strings.
If I install it, can I remove it after I translated what I need? Can I make it other way?
This is the easier and faster way I am aware of.
That said, another way is to send your own translations to the Hebrew translation project on “Translating WordPress” site, here: https://translate.www.ads-software.com/locale/he/default/wp-plugins/listo/
Please note that you would to wait until the General Translation Editors from the Hebrew locale approve your translations, which can be taking some time, since they have not an active Slack group (see). In addition, you have to reach +90% of the translations, before a language pack is generated.
That said, you could ask to be a Project Translation Editor (PTE) for this plugin! See: https://make.www.ads-software.com/polyglots/handbook/plugin-theme-authors-guide/pte-request/#plugin-theme-author-translation-review-pte-request
As mentioned above, if you manage to complete unless 90% of the translations, a language pack for Hebrew will be created, and you would not need any plugin to get the translations, since they will be available on the public www.ads-software.com ecosystem, not only for you, but every WordPress site that is using Loco in Hebrew!