I've detected that if my default language set by the browser is Catalan, the calls to hoverNotification() return error as some of the messages can contain the apostrophe sign.

To avoid problems with languages that use this type of signs, messages should be surrounded by quotation marks.

To reproduce the issue, pass Catalan as preferred language in the headers:

Accept-Language: ca,en;q=0.8,ca-ES;q=0.6,es;q=0.4