I am working on a multilingual site right now, and am using the Internationalization suite of modules to build it out.

The site has some custom blocks in it that I would normally use DRUPAL_CACHE_GLOBAL in the hook_block_info() definition. However, some of these will have translatable strings in them, so I really need to cache them per-language.

Is this possible? Or, is my only real option to use DRUPAL_CACHE_PER_PAGE?

  • Could you use DRUPAL_CACHE_CUSTOM? I've not had much experience with multilingual sites, but I suppose in theory you could cache the content in a custom language based cache (e.g. cache_set/cache_get with mpd_awesome_site_fr, mpd_awesome_site_ru)
    – Chapabu
    Sep 6, 2013 at 8:52
  • @Chapabu I am considering that. I have just seen very little use of it in the wild (the core forum module is the only place I have ever seen it), so I don't really know how much of a "best practice" it is.
    – mpdonadio
    Sep 6, 2013 at 14:02
  • This module on GitHub seems to do some multilingual block caching stuff of it's own - don't know if it's helpful
    – Chapabu
    Sep 6, 2013 at 14:26

1 Answer 1


Just use DRUPAL_CACHE_GLOBAL. On multilingual sites the users language is part of the (cid), i.e. the key used when storing/fetching entries to/from the block cache.

The function responsible for this behavior is drupal_render_cid_parts which is called from _block_get_cache_id.

You can embed the following fragment into a custom PHP block in order to verify the mechanism:

$fakeblock = (object) array(
  'module' => 'some-module',
  'delta' => 'some-delta',
print _block_get_cache_id($fakeblock);

On a multilingual site, the fragment should print something like:


  • Thanks. Didn't catch that when I traced everything out the first time.
    – mpdonadio
    Nov 4, 2013 at 21:49

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