Can I translate the subscription widgets for my multi language store?

We generally have multi-language support (even on our FREE plan) for almost every text in our app (including emails, customer portal and subscription widgets). You can translate those in Seal Subscriptions > Settings > Translations. The only exception are the texts that you set up in the auto-charging subscription rules. These can be easily translated with Shopify's free "Shopify Translate & Adapt" app (https://apps.shopify.com/translate-and-adapt).

Another option would be also to use another third party app to translate these values. The third party translations apps usually have the capability of translating the dynamic elements. For example, if you are using the Weglot translations app, then you will just have to add a class .sealsubs-target-element the list of dynamic elements in Weglot app. You will then be able to translate the subscription widget for auto-charging subscription rules. In Langify app, you can translate the widgets with a feature called Custom. It allows you to add a custom text and translate it into your desired language.