Perhaps you should try some spelling variations:
multiling » multilingue, multilingues
multilinguismo » multilingueuismo, multilinguesuismo, multilingualism, multilingumismo, multilinguistmo, multilinguiso
{uml}ismo." » {uml}mismo.", {uml}istmo.", {uml}iso."
{uml}iismo." » {uml}imismo.", {uml}iistmo.", {uml}iiso.", {uml}mismo.", {uml}itsmo.", {uml}uismo."
{uml}sismo." » {uml}smismo.", {uml}sistmo.", {uml}siso.", {uml}sismos.", {uml}mismo.", {uml}simo."

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 multilinguismo)(({uml}ismo." OR {uml}iismo.") or {uml}sismo.")~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "\"(multiling or multilinguismo)(({uml}ismo.\" OR {uml}iismo.\") or {uml}sismo.\")".
• Removing quotes may allow a broader search: (multiling or multilinguismo)(({uml}ismo. OR {uml}iismo. ) or {uml}sismo. ).
• Adding a wildcard symbol may retrieve word variants: "(multiling or multilinguismo)(({uml}ismo." OR {uml}iismo.") or {uml}sismo.")*.