Perhaps you should try some spelling variations:
multiling » multilingues
multilingue » multilinguesue
multilinguiso » multilinguesuiso, multilinguismo, multilinguisme, multilinguista
{uml}ismo." » {uml}sismo.", {uml}istmo.", {uml}iso."
{uml}mismo." » {uml}msismo.", {uml}mistmo.", {uml}miso."
{uml}itsmo." » {uml}iismo."

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: "((multiling or multilingue) or multilinguiso)(({uml}ismo." OR {uml}itsmo.") or {uml}mismo.")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"((multiling or multilingue) or multilinguiso)(({uml}ismo.\" OR {uml}itsmo.\") or {uml}mismo.\")".
• Removing quotes may allow a broader search: ((multiling or multilingue) or multilinguiso)(({uml}ismo. OR {uml}itsmo. ) or {uml}mismo. ).
• Adding a wildcard symbol may retrieve word variants: "((multiling or multilingue) or multilinguiso)(({uml}ismo." OR {uml}itsmo.") or {uml}mismo.")*.