diff --git a/src/lang/sk.ts b/src/lang/sk.ts
new file mode 100644
index 0000000..39dc897
--- /dev/null
+++ b/src/lang/sk.ts
@@ -0,0 +1,26 @@
+export default function(number: number, index: number): [string, string] {
+  let inflectionIndex = 0;
+
+  const isInflectionNeeded =
+    index == 1 || index == 3 || index == 5 || index == 7 || index == 9 || index == 11 || index == 13;
+  if (isInflectionNeeded && number >= 5) {
+    inflectionIndex = 1;
+  }
+
+  return [
+    [['práve teraz', 'práve teraz']],
+    [['pred %s sekundami', 'o %s sekundy'], ['pred %s sekundami', 'o %s sekúnd']],
+    [['pred minútou', 'o minútu']],
+    [['pred %s minútami', 'o %s minúty'], ['pred %s minútami', 'o %s minút']],
+    [['pred hodinou', 'o hodinu']],
+    [['pred %s hodinami', 'o %s hodiny'], ['pred %s hodinami', 'o %s hodín']],
+    [['včera', 'zajtra']],
+    [['pred %s dňami', 'o %s dni'], ['pred %s dňami', 'o %s dní']],
+    [['minulý týždeň', 'budúci týždeň']],
+    [['pred %s týždňami', 'o %s týždne'], ['pred %s týždňami', 'o %s týždňov']],
+    [['minulý mesiac', 'budúci mesiac']],
+    [['pred %s mesiacmi', 'o %s mesiace'], ['pred %s mesiacmi', 'o %s mesiacov']],
+    [['pred rokom', 'budúci rok']],
+    [['pred %s rokmi', 'o %s roky'], ['pred %s rokmi', 'o %s rokov']],
+  ][index][inflectionIndex] as [string, string];
+}