Template based on Helix Ultimate, like any other template, includes .ini file which contains all of the English terms that we used: language\en-GB\en-GB.tpl_keynote.ini

Step 1:
Install Joomla translation for your native language, make it active.

Step 2:
Change the filename keeping original template name, for example:
from: en-GB.tpl_keynote.ini
to: xx-XX.tpl_keynote.ini

Where xx-XX is a LANG-PREFIX, for example, es-ES – for Spanish (Español), nl-NL – for Dutch, ru-RU - Russian, de-DE - German, etc.

Step 3:
In most cases, you should translate 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. File (.ini) must be saved as UTF-8 without BOM encoding. Inside you can find phrases for new addons. Example Helix phrases:

HELIX_ALREADY_RATED="You are already rated."
HELIX_ULTIMATE_MONTH="Month"
HELIX_ULTIMATE_MONTHS="Months"
HELIX_ULTIMATE_DAY="Day"
HELIX_ULTIMATE_DAYS="Days"
HELIX_ULTIMATE_HOUR="Hour"
HELIX_ULTIMATE_HOURS="Hours"
HELIX_ULTIMATE_MINUTE="Minute"
HELIX_ULTIMATE_MINUTES="Minutes"
HELIX_ULTIMATE_SECOND="Second"
HELIX_ULTIMATE_SECONDS="Seconds"
HELIX_ULTIMATE_TAGS="Tags :"
HELIX_ULTIMATE_SHARE="Share"

Example Addons phrases:

COM_SPPAGEBUILDER_ADDON_SPEAKERS="Event Speakers"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_DESC="Show list of event speakers."
COM_SPPAGEBUILDER_ADDON_SPEAKERS_TYPE="Speakers Type"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_TYPE_DESC="Select the type of speakers you want to show."
COM_SPPAGEBUILDER_ADDON_SPEAKERS_TYPE_ALL="All Speakers"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_TYPE_KEYNOTE="Keynote Speakers only"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_TYPE_NOT_KEYNOTE="Do not show keynote speakers"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_COUNT="Count"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_COUNT_DESC="Set the number of speakers you want to display."
COM_SPPAGEBUILDER_ADDON_SPEAKERS_COLUMN="Column"
COM_SPPAGEBUILDER_ADDON_SPEAKERS_COLUMN_DESC="Set the number of speakers column in a row."
EVENTUM_SPEAKER="Speaker"
EVENTUM_SPEAKERS="Speakers"
TPL_KEYNOTE_LABEL_TOPIC="Topic"
COM_SPPAGEBUILDER_ADDON_SCHEDULES="Event Schedules"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_DESC="Display shortlist event schedules."
COM_SPPAGEBUILDER_ADDON_SCHEDULES_COUNT="Schedules Count"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_COUNT_DESC="Set the number of schedules you want to show."
COM_SPPAGEBUILDER_ADDON_SCHEDULES_SESSION_COUNT="Session Count"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_SESSION_COUNT_DESC="Set the number of sessions you want to show in each schedule."
COM_SPPAGEBUILDER_ADDON_SCHEDULES_COLUMN="Column Count"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_COLUMN_DESC="Set the number of columns in a row. This setting is applicable for grid layout only."
COM_SPPAGEBUILDER_ADDON_SCHEDULES_LAYOUT="Layout"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_LAYOUT_DESC="Select a layout from the list below. The default layout is grid layout."
COM_SPPAGEBUILDER_ADDON_SCHEDULES_LAYOUT_CLASSIC="Classic"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_LAYOUT_GRID="Grid"
COM_SPPAGEBUILDER_ADDON_SCHEDULES_LAYOUT_LIST="List"

Step 4:
Once the phrases inside the file are translated, you can copy your language file into your language directory using an FTP client.

Notice! Other phrases can be from different components as SP Page Builder, SP Simple Portfolio.