*Huckleberry* seems to be a generic name. There are various types of berries in North America commonly called "huckleberries" and they can be given different names as we can see on the site of the [Wild Huckleberry Association][1]. Huckleberries are mostly wild, they don't domesticate easily as pointed out by the [University of Idaho][2] and this is probably why they can be found under so many local names. Even the same exact species can have several different names as we can see on the site of the [Wild Huckleberry Association][3]. *Blueberry* and *bilberry* are probably terms that will be more familiar to a European audience where *huckleberries* are concerned.

In France we usually call them [*myrtilles*][4] (which is also a generic term), in Britain [*bilberries*][5] (which is also a generic term) but they probably aren't the same exact species you are looking at.   
So I would say that whatever the translation it can only be an approximation and as said [in a comment][6] by Lambie if we want to be accurate we have to use the Latin name, but of course no one uses the Latin name unless they are a botanist.  
 If you are looking at the [huckleberry species][3] *Vaccinium myrtillus* then I would  confidently say we call it [*myrtille*][4] because it is a common species in France. *Vaccinium uliginosum* (also listed on [Huckleberry Species page][3] is also commonly called *myrtille* but to be precise it should be [*myrtille des marais*][7] or *Airelle des marais* and *Airelle des marécages* in Québec. In they Vosges they are called [Brimbelles][8] and *brimbelles* are probably to the Vosges what *huckleberries* are to Idaho.



  [1]: http://wildhuckleberry.com/
  [2]: http://wildhuckleberry.com/2023/07/24/new-university-of-idaho-study-on-huckleberries/
  [3]: http://wildhuckleberry.com/species/
  [4]: https://fr.wikipedia.org/wiki/Myrtille
  [5]: https://en.wikipedia.org/wiki/Bilberry
  [6]: https://french.stackexchange.com/questions/52104/whats-the-translation-of-huckleberry-in-french?noredirect=1#comment119409_52104
  [7]: https://fr.wikipedia.org/wiki/Myrtille_des_marais
  [8]: https://france3-regions.francetvinfo.fr/grand-est/2014/07/15/vosges-tout-savoir-sur-les-brimbelles-517425.html