Index: gc_lang/fr/webext/content_scripts/panel_gc.css
==================================================================
--- gc_lang/fr/webext/content_scripts/panel_gc.css
+++ gc_lang/fr/webext/content_scripts/panel_gc.css
@@ -208,11 +208,12 @@
 
 /*
     ERRORS
 */
 mark.grammalecte_error,
-mark.grammalecte_spellerror {
+mark.grammalecte_spellerror,
+mark.grammalecte_maybe_spellerror {
     margin: 0;
     padding: 0;
     cursor: pointer;
     border-radius: 2px;
     background-color: hsl(240, 0%, 80%);        /* default color */
@@ -225,20 +226,27 @@
     text-shadow: unset;
     text-align: left;
     hyphens: none;
 }
 mark.grammalecte_error:hover,
-mark.grammalecte_spellerror:hover {
+mark.grammalecte_spellerror:hover,
+mark.grammalecte_maybe_spellerror:hover {
     opacity: .9;
     box-shadow: 0px 0px 0px 3px hsla(0, 0%, 50%, 0.25);
 }
 
 mark.grammalecte_spellerror {
     background-color: hsl(0, 100%, 95%);
     color: hsl(0, 80%, 20%);
     border-bottom: solid 2px hsl(0, 100%, 50%);
 }
+mark.grammalecte_maybe_spellerror {
+    background-color: hsla(0, 100%, 100%, 0);
+    color: hsl(0, 80%, 0%);
+    border-bottom: solid 2px hsl(0, 100%, 50%);
+}
+
 
 mark.grammalecte_error_corrected,
 mark.grammalecte_error_ignored {
     margin: 0;
     padding: 0;

Index: gc_lang/fr/webext/content_scripts/panel_gc.js
==================================================================
--- gc_lang/fr/webext/content_scripts/panel_gc.js
+++ gc_lang/fr/webext/content_scripts/panel_gc.js
@@ -369,11 +369,15 @@
                 xNodeErr.style.backgroundColor = `hsl(${sHue}, ${sSat}%, 85%)`;
                 xNodeErr.style.borderBottom = `solid 2px hsl(${sHue}, ${sSat}%, ${sLum}%)`;
             }
         }
         else {
-            xNodeErr.className = "grammalecte_spellerror";
+            if (sUnderlined.search(/^[A-ZÀ-ÖØ-ߌ][a-zà-öø-ÿff-st]/) !== -1) {
+                xNodeErr.className = "grammalecte_maybe_spellerror";
+            } else {
+                xNodeErr.className = "grammalecte_spellerror";
+            }
         }
         return xNodeErr;
     }
 
     _blockParagraph (xParagraph) {