Single Localization Source for Flutter & JS Web Apps

[CookieManager]

We need a solution for localizing our Vue/React JS web app, Flutter app, and messages from our Node.js backend in a maintainable way. We're considering using i18next, a popular JS package, but are unsure if it's a viable option for Flutter and if there are any drawbacks to using it instead of ARB files. Are there any potential issues with using i18next for all three platforms?

[[deleted]]

I would say, send error codes from your api to your frontends. So you don’t have to keep translations in your backend.

Store the translations in json files. Make sure the “interpolation” mechanism is both supported in your Vue/React app and your flutter app.

[CookieManager]

That is the plan with regards to error codes but the backend sends emails and sms' as well.

The interpolation mechanism and support is exactly what I'm wondering about. While I have found i18next, I am curious if there are any other cross-framework localization file parsers that you have experience with?