I LOVE Ç

XCompose/config.lua

@@ -0,0 +1,6 @@
+return {
+	target = {
+		linux = "~",
+		default = "~",
+	},
+}

XCompose/files/.XCompose

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+# Custom compose sequences
+# Override ' + c to produce ç (cedilla) instead of ć (c with acute)
+
+include "%L"  # Include system defaults
+
+# Cedilla
+<dead_acute> <c> : "ç"
+<dead_acute> <C> : "Ç"
+<apostrophe> <c> : "ç"
+<apostrophe> <C> : "Ç"