experience crashes when running LyX.
[[Context]] is used to distinguish otherwise identical strings, which could
-have different translations depending on the Context. [[Context]] appears only
-in msgid string and should not be repeated in the translated version.
+have different translations depending on the Context. It can also be used to
+indicate what is substituted for a placeholder. [[Context]] appears only in
+msgid string and should not be repeated in the translated version.
{} refer to counters and must not be translated. An example would be:
msgid "Algorithm \\arabic{theorem}"