Here is the end of the log :

• Collection of administration scripts for Calculate (U) sys-apps/calculate-toolkit-0.1.11 (22 KiB)
  Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/calculate/core/server/func.py", line 682, in run
  res = method(*args)
  File "/usr/lib64/python2.7/site-packages/calculate/update/update.py", line 817, in premerge
  self._display_install_package(emerge, emergelike)
  File "/usr/lib64/python2.7/site-packages/calculate/update/update.py", line 721, in _display_install_package
  self._display_pretty_package_list(pkglist)
  File "/usr/lib64/python2.7/site-packages/calculate/update/update.py", line 707, in _display_pretty_package_list
  flag=install_flag))
  UnicodeEncodeError: 'ascii' codec can't encode characters in position 0-7: ordinal not in range(128) * UnicodeEncodeError:'ascii' codec can't encode characters in position 0-7: ordinal not in range(128)(calculate.update.update:707) * Mise à jour échouée

And thank you for your awesome work !