diff --git a/mo/web/jinja.py b/mo/web/jinja.py
index 9ccf3e5e419a69be102b08ac89fe07fa5a6c5c16..59c744f19a92619545a76d29fb25d10af96c189d 100644
--- a/mo/web/jinja.py
+++ b/mo/web/jinja.py
@@ -87,6 +87,11 @@ def none_value(s: Any, none_value: Any) -> Any:
     return none_value if s is None else s
 
 
+@app.template_filter()
+def yes_no(a: bool) -> str:
+    return "ano" if a else "ne"
+
+
 @app.template_filter()
 def json_pretty(js: Any) -> str:
     return json.dumps(js, sort_keys=True, indent=4, ensure_ascii=False)