I found a file in usr/share/applications/calibre and it has this inside
Code:
Version=1.0
Type=Application
Name=calibre
GenericName=E-book library management
Comment=E-book library management: Convert, view, share, catalog all your e-books
TryExec=calibre
Exec=calibre --detach %U
Icon=calibre-gui
Categories=Office;
X-GNOME-UsesNotifications=true
Keywords=epub;ebook;manager;
MimeType=application/epub+zip;application/ereader;application/oebps-package+xml;application/pdf;application/vnd.ms-word.document.macroenabled.12;ap plication/vnd.oasis.opendocument.text;application/vnd.openxmlformats-officedocument.wordprocessingml.document;application/x-cb7;application/x-cbc;a pplication/x-cbr;application/x-cbz;application/x-mobi8-ebook;application/x-mobipocket-ebook;application/x-mobipocket-subscription;application/x-rub y;application/x-sony-bbeb;application/xhtml+xml;image/vnd.djvu;text/fb2+xml;text/html;text/plain;text/rtf;text/x-markdown;x-scheme-handler/calibre;
But even if any language is selected in preferences/appearance, calibre does not seem to respect that parameter. Following Kovid's instructions, I created the calibre.desktop file in this path .local/share/applications/ with this inside
Code:
[Desktop Entry]
Version=1.0
Type=Application
Name=calibre
GenericName=E-book library management
Comment=E-book library management: Convert, view, share, catalog all your e-books
TryExec=calibre
Exec=env CALIBRE_OVERRIDE_LANG=es calibre --detach %U
Icon=calibre-gui
Categories=Office;
X-GNOME-UsesNotifications=true
Keywords=epub;ebook;manager;
MimeType=application/epub+zip;application/ereader;application/oebps-package+xml;application/pdf;application/vnd.ms-word.document.macroenabled.12;ap plication/vnd.oasis.opendocument.text;application/vnd.openxmlformats-officedocument.wordprocessingml.document;application/x-cb7;application/x-cbc;a pplication/x-cbr;application/x-cbz;application/x-mobi8-ebook;application/x-mobipocket-ebook;application/x-mobipocket-subscription;application/x-rub y;application/x-sony-bbeb;application/xhtml+xml;image/vnd.djvu;text/fb2+xml;text/html;text/plain;text/rtf;text/x-markdown;x-scheme-handler/calibre;
Adding Exec=env CALIBRE_OVERRIDE_LANG=es calibre --detach %U
Now calibre starts in Spanish.
Thanks