Hello João,

Thank you for contacting Infragistics.

igCombo does not support accent folding. You can implement it by canceling filtering event of the combo (https://www.igniteui.com/help/api/2017.1/ui.igcombo#events:filtering), and creating the correct filter expressions by yourself. Our newest method filterByExpressions (not documented yet) could help you with filtering by multiple expressions:

 //filter by expression
$(".selector").igCombo("filterByExpressions", [{cond: "startsWith", expr: "Smith", logic: "or"}]);

//filter by array of expressions
$(".selector").igCombo("filterByExpressions", [{cond: "startsWith", expr: "Smith", logic: "or"}, {cond: "startsWith", expr: "Mary", logic: "and"}]);

//filter by array of expressions and trigger events
$(".selector").igCombo("filterByExpressions", [{cond: "startsWith", expr: "Smith", logic: "and"}, {cond: "endsWith", expr: "Sauerkraut", logic: "and"}], true);

Basically you can detect each symbol and add an expression for each accent.

If you use remote data source I recommend to implement entire accent folding logic there and just to return the correct records to the UI.

If you want this feature implemented by our team, please take a look here http://ideas.infragistics.com for how you can submit this idea.

I hope this is helpful.

Please let me know if you need something else.