Is there any chance that the Maplink 2018 improvements to internationalised names could find their way on to this system as well? To have the new default of 'language of the wiki', even without all the additional versions, would be a huge improvement over the current version for pretty much everyone. (If retaining the current 'osm-intl' it probably could be renamed as osm-local to match the mapframe usage). The no-labels 'osm' style has also been heavily requested and I have found useful, so to end up with all three would be great.
Topic on Template talk:Graph:Street map with marks/Flow
This should be fairly simple to add a language parameter to the graphoid service, and let it pass it through to the map service. It's actually a very simple few line change - https://github.com/nyurik/mw-graph-shared/blob/master/src/VegaWrapper.js#L306
P.S. @RobinLeicester I would suggest filing a Phabricator ticket for this (and add alink to the code) - much more likely it would be acted on.