diff --git a/i18n/id.json b/i18n/id.json
index 2614c333..e632aca7 100644
--- a/i18n/id.json
+++ b/i18n/id.json
@@ -4,6 +4,7 @@
 			"IvanLanin",
 			"Iwan Novirion",
 			"Meursault2004",
+			"RXerself",
 			"Rex"
 		]
 	},
@@ -15,11 +16,11 @@
 	"pfunc_expr_stack_exhausted": "Kesalahan ekspresi: Stack habis",
 	"pfunc_expr_unexpected_number": "Kesalahan ekspresi: Angka yang tak terduga",
 	"pfunc_expr_preg_match_failure": "Kesalahan ekspresi: Kegagalan preg_match tak terduga",
-	"pfunc_expr_unrecognised_word": "Kesalahan ekspresi: Kata \"$1\" tak dikenal.",
+	"pfunc_expr_unrecognised_word": "Kesalahan ekspresi: Kata \"$1\" tidak dikenal.",
 	"pfunc_expr_unexpected_operator": "Kesalahan ekspresi: Operator $1 tak terduga",
 	"pfunc_expr_missing_operand": "Kesalahan ekspresi: Operand tak ditemukan untuk $1",
 	"pfunc_expr_unexpected_closing_bracket": "Kesalahan ekspresi: Kurung tutup tak terduga",
-	"pfunc_expr_unrecognised_punctuation": "Kesalahan ekspresi: Karakter tanda baca \"$1\" tak dikenali.",
+	"pfunc_expr_unrecognised_punctuation": "Kesalahan ekspresi: Karakter tanda baca \"$1\" tidak dikenal.",
 	"pfunc_expr_unclosed_bracket": "Kesalahan ekspresi: Kurung tanpa tutup",
 	"pfunc_expr_division_by_zero": "Pembagian oleh nol",
 	"pfunc_expr_invalid_argument": "Argumen tidak berlaku untuk $1: < -1 or > 1",
diff --git a/i18n/syl.json b/i18n/syl.json
new file mode 100644
index 00000000..13dc6fdb
--- /dev/null
+++ b/i18n/syl.json
@@ -0,0 +1,8 @@
+{
+	"@metadata": {
+		"authors": [
+			"এম আবু সাঈদ"
+		]
+	},
+	"pfunc_expr_unrecognised_punctuation": "ꠜꠥꠟ ꠎꠤꠘꠤꠡ: \"$1\" ꠁ ꠌꠤꠘ꠆ꠘꠞꠦ ꠍꠤꠘꠦꠞ ꠘꠣ⁕"
+}