JoomShaper only produces the English language file (en-GB.tpl_shaper_helixultimate.ini) for Helix Ultimate. All other languages were made by (thanks to) Joomla community:

• Russian (ru-RU) translation
• ....

We agree that translation is a crucial part of the website-localization process, and may also help your customer to understand how Helix Ultimate template works (admin panel) and front-end phrases. Helix, like any other template, includes .ini file which contains all of the English terms we used. Don't worry, you should translate only single file:

language\en-GB\en-GB.tpl_shaper_helixultimate.ini

Translate all or selected strings (used on front-end) to your language and save them with native language prefix. Each translated string must always be enclosed by double quotes.

Then, you need to change the filename
from: en-GB.tpl_shaper_helixultimate.ini
to: xx-XX.tpl_shaper_helixultimate.ini

Where xx-XX is a LANG-PREFIX, for example, es-ES – for Spanish (Español), nl-NL – for Dutch etc.

File (.ini) must be saved as UTF-8 without BOM encoding. Once the phrases inside the file are translated, you can copy your language file into your language directory using an FTP client.

language\xx-XX\xx-XX.tpl_shaper_helixultimate.ini

That's all.