Ionic app translation

I’ve used ionic 3 to build an android application. Now I need to internationalise it, but how?
I could not find a proper way to implement it.

As of now I have tried the following things and had some limitations.
1.ngx-translate : cannot use ICS expressions.
2.angular way : not an angular project, so, cannot use cli commands to extract strings and build.
3.i18n.js : contexts are not working.

can you tell me which method are you using to translate.
I need to be able to use ICS expressions in it.

if there is any angular way please tell.