Version 2.26.2:
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* Accessibility Guide:
 - Fixed validity errors in translations (Claude Paroz, Shaun McCance)
 - Updated translations:
   el    (Jennie Petoumenou)
   en_GB (Philip Withnall)
   hu    (Gabor Kelemen)
* System Admin Guide:
 - Fixed typo, bug #577327 (Milo Casagrande)
 - Updated translations:
   el    (Jennie Petoumenou)
   es    (Jorge Gonzalez)
* User Guide:
 - Fixed validity errors in translations (Claude Paroz, Shaun McCance)
 - Removed outdated info on session preferences (Paul Cutler)
 - Updated translations:
   el    (Μάριος Ζηντίλης)
   es    (Jorge Gonzalez)
   fr    (Claude Paroz)
   zh_CN (TeliuTe)