Please include this line of code:
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />

inside start.html.

When importing the published SCORM 1.2 of Courselab through Online Learning and Training (OLAT) v.7, http://www.olat.org/, the content does not show.

It seems HTML code is not included in this comment box.

The code just includes a "meta" element set the "char-set" to "utf-8".

See this JIRA for further information.
http://bugs.olat.org/jira/browse/OLAT-3882

That's one of those odd implementation decisions you see as probably over 50% of global web type content uses UTF8 encoding.
It is also the de-facto standard in most operating systems, APIs, programming languages and the software they produce.