diff --git a/i18n/cy.json b/i18n/cy.json
index 3699d724f..d7ff82c38 100644
--- a/i18n/cy.json
+++ b/i18n/cy.json
@@ -30,8 +30,8 @@
 	"math_syntax_error": "gwall cystrawen",
 	"math_unknown_error": "gwall anhysbys",
 	"math_unknown_function": "ffwythiant anhysbys, '$1'",
-	"mw_math_mathml": "MathML os yn bosib (arbrofol)",
-	"mw_math_source": "Gadewch fel côd LaTeX (ar gyfer porwyr testun)",
+	"mw_math_mathml": "SVG (gellir defnyddio MathML trwy ychwanegyn porwr)",
+	"mw_math_source": "Cod LaTeX (ar gyfer porwyr testun)",
 	"prefs-math": "Mathemateg",
 	"mathstatus": "Statws Math",
 	"math-wikibase-formula": "Fformiwla",
diff --git a/i18n/shn.json b/i18n/shn.json
new file mode 100644
index 000000000..278b9d02f
--- /dev/null
+++ b/i18n/shn.json
@@ -0,0 +1,8 @@
+{
+	"@metadata": {
+		"authors": [
+			"Saimawnkham"
+		]
+	},
+	"math-wikibase-formula-description": "ၶေႃႈသပ်းလႅင်း"
+}