I can recommend the ngx-translate module, we are using it in production in some projects.
- It is easy to integrate and transactions are stored in the JSON files.
- Translations are runtime (dynamically inserted through selector keys)
- Translate invoked through the translation pipe or translation directive
There are also other options summarized in comparison table from angular2localization, that is shown below

We are also using the native Angular i18n solution, it is integrated into angular CLI build tool and also really easy to use. There is a major drawback of the rebuild for each app localization. It is nicely summarized here.
Also in the angular2translate readme is mentioned this library for usage with Meteor, so there are always multiple options to choose from.