Hello,
The autoamtic engine will only translate content in one particular language on one particular page the first time someone views that page in that language. This means that there is no complete scanning and translating of the entire site. Instead, it’s done incrementally as the pages are accessed.
In case some of your products are not translated, it could mean they were not acessed by you or by the users in the front in different languages in order for the translations to appear. Alternatively, you can force translations by browsing in the Translation Editor. This would be like browsing all the languages at the same time. Translations will be retrieved for all languages for the content being viewed in the Translation Editor.
Also, it if some products are not translated it could also mean you reached the limit of the machine translation and you should upgrade the quota. Please, check in the TP Settings –> Automatic Translation tab.