Inner tag overrides outer, which overrides HTTP header
<p lang="en">He said <q
lang="it">Grazie</q> and left.</p>
  - 
    Tags are hierarchical:
  
 - 
    'en-US' matches 'en-US' (preferred)
  
- 
    'en-US' also matches 'en'
  
[Language info sometimes may be derived heuristically from charset]