diff --git a/web/js/i18n.js b/web/js/i18n.js
index d277899..4c8bea4 100644
--- a/web/js/i18n.js
+++ b/web/js/i18n.js
@@ -48,6 +48,11 @@ export function onLangChange(fn) {
   return () => listeners.delete(fn);
 }
 
+// Human name for a complexity tier; custom tier names pass through as-is.
+export function trTier(tier) {
+  return ["low", "medium", "high"].includes(tier) ? t("tier." + tier) : tier;
+}
+
 export function t(key, vars) {
   const d = DICTS[lang] || en;
   let s = d[key] ?? en[key] ?? key;
diff --git a/web/js/i18n/de.js b/web/js/i18n/de.js
index cc8c5fd..f3b1ecb 100644
--- a/web/js/i18n/de.js
+++ b/web/js/i18n/de.js
@@ -631,4 +631,7 @@ export default {
   "routing.tasks.addModel": "Modell",
   "routing.bands.enable": "Eigene Komplexitätsgrenzen",
   "routing.bands.hint": "Ziehen Sie die Griffe: wo low endet und high beginnt — die Griffe schieben einander, die Zahlen aktualisieren sich live. Der kontinuierliche Router-Score wird mit IHREN Grenzen neu eingeteilt; ohne Häkchen gelten die Grenzen des Routers.",
+  "tier.low": "leicht",
+  "tier.medium": "mittel",
+  "tier.high": "schwer",
 };
diff --git a/web/js/i18n/en.js b/web/js/i18n/en.js
index e31d584..80c81cf 100644
--- a/web/js/i18n/en.js
+++ b/web/js/i18n/en.js
@@ -624,4 +624,7 @@ export default {
   "routing.tasks.addModel": "model",
   "routing.bands.enable": "My complexity boundaries",
   "routing.bands.hint": "Drag the handles to set where low ends and where high begins — the handles push each other, the numbers update live. The router's continuous score is re-mapped with YOUR boundaries; unchecked = the router's own bands.",
+  "tier.low": "low",
+  "tier.medium": "medium",
+  "tier.high": "high",
 };
diff --git a/web/js/i18n/es.js b/web/js/i18n/es.js
index a8dbeb9..72e0632 100644
--- a/web/js/i18n/es.js
+++ b/web/js/i18n/es.js
@@ -631,4 +631,7 @@ export default {
   "routing.tasks.addModel": "modelo",
   "routing.bands.enable": "Mis límites de complejidad",
   "routing.bands.hint": "Arrastra los tiradores: dónde termina low y dónde empieza high — se empujan entre sí y las cifras se actualizan en vivo. La puntuación continua del router se re-mapea con TUS límites; sin marcar = las bandas del propio router.",
+  "tier.low": "fácil",
+  "tier.medium": "medio",
+  "tier.high": "difícil",
 };
diff --git a/web/js/i18n/fr.js b/web/js/i18n/fr.js
index 6d32b89..887d2f7 100644
--- a/web/js/i18n/fr.js
+++ b/web/js/i18n/fr.js
@@ -631,4 +631,7 @@ export default {
   "routing.tasks.addModel": "modèle",
   "routing.bands.enable": "Mes limites de complexité",
   "routing.bands.hint": "Faites glisser les poignées : où finit low et où commence high — elles se poussent l'une l'autre, les chiffres se mettent à jour en direct. Le score continu du routeur est re-découpé avec VOS limites ; décoché = les bandes du routeur.",
+  "tier.low": "facile",
+  "tier.medium": "moyen",
+  "tier.high": "difficile",
 };
diff --git a/web/js/i18n/ru.js b/web/js/i18n/ru.js
index 9fe231b..47eb081 100644
--- a/web/js/i18n/ru.js
+++ b/web/js/i18n/ru.js
@@ -623,4 +623,7 @@ export default {
   "routing.tasks.addModel": "модель",
   "routing.bands.enable": "Мои границы сложности",
   "routing.bands.hint": "Тяните ручки: где кончается low и где начинается high — ручки толкают друг друга, цифры обновляются на лету. Непрерывный score роутера пересчитывается ВАШИМИ границами; галочка снята — действуют пороги самого роутера.",
+  "tier.low": "лёгкий",
+  "tier.medium": "средний",
+  "tier.high": "сложный",
 };
diff --git a/web/js/i18n/tr.js b/web/js/i18n/tr.js
index 6492030..5d2bb43 100644
--- a/web/js/i18n/tr.js
+++ b/web/js/i18n/tr.js
@@ -631,4 +631,7 @@ export default {
   "routing.tasks.addModel": "model",
   "routing.bands.enable": "Kendi karmaşıklık sınırlarım",
   "routing.bands.hint": "Tutamaçları sürükleyin: low nerede biter, high nerede başlar — tutamaçlar birbirini iter, sayılar anlık güncellenir. Yönlendiricinin sürekli puanı SİZİN sınırlarınızla yeniden bölümlenir; işaret kaldırılırsa yönlendiricinin kendi bantları geçerli.",
+  "tier.low": "kolay",
+  "tier.medium": "orta",
+  "tier.high": "zor",
 };
diff --git a/web/js/i18n/zh.js b/web/js/i18n/zh.js
index a86e412..801fafb 100644
--- a/web/js/i18n/zh.js
+++ b/web/js/i18n/zh.js
@@ -631,4 +631,7 @@ export default {
   "routing.tasks.addModel": "模型",
   "routing.bands.enable": "自定义复杂度边界",
   "routing.bands.hint": "拖动手柄设定 low 到哪里结束、high 从哪里开始 — 手柄会相互推动，数字实时更新。路由器的连续得分将按你的边界重新划分；取消勾选则使用路由器自身的边界。",
+  "tier.low": "简单",
+  "tier.medium": "中等",
+  "tier.high": "困难",
 };
diff --git a/web/js/views/benchmark.js b/web/js/views/benchmark.js
index edeae8e..140d319 100644
--- a/web/js/views/benchmark.js
+++ b/web/js/views/benchmark.js
@@ -8,7 +8,7 @@
 // (keyword checks with | synonyms, think-tag stripping, anti-loop detection,
 // pass/partial/fail), now embedded, localized and CDN-free.
 import { h, mount, toast, ms, money, moneyEl } from "../ui.js";
-import { t } from "../i18n.js";
+import { t, trTier } from "../i18n.js";
 import { api, testStream } from "../api.js";
 
 // ── built-in suite ──────────────────────────────────────────────────────────
@@ -402,7 +402,7 @@ export async function renderBenchmark() {
                 : h("span", { class: r.taskOk ? "" : "err" },
                     (r.taskOk ? "✓ " : "✗ ") + r.task,
                     r.taskOk ? "" : h("div", { class: "muted small" }, t("bm.expectedLbl") + " " + (r.expected || []).join("/")))),
-          h("td", {}, r.tier ? h("span", { class: "badge tier-" + r.tier }, r.tier) : "—"),
+          h("td", {}, r.tier ? h("span", { class: "badge tier-" + r.tier }, trTier(r.tier)) : "—"),
           h("td", {},
             h("span", { class: "mono small" }, r.chosen || "—"),
             r.cost > 0 ? h("div", { class: "muted small" }, moneyEl(r.cost)) : null,
diff --git a/web/js/views/playground.js b/web/js/views/playground.js
index 9f4fc56..bb20bc8 100644
--- a/web/js/views/playground.js
+++ b/web/js/views/playground.js
@@ -5,7 +5,7 @@
 // Media results are decoded in the browser (PPM → canvas, MJPEG AVI → canvas
 // player synced to the wav) — the same no-ffmpeg stance as the engine itself.
 import { h, mount, toast, money, moneyEl, ms } from "../ui.js";
-import { t } from "../i18n.js";
+import { t, trTier } from "../i18n.js";
 import { api, testStream, mediaFileUrl, mediaFileBytes } from "../api.js";
 import { appState } from "../app.js";
 import { ppmToCanvas, fileToPpmB64, aviJpegFrames, mjpegPlayer } from "../media-utils.js";
@@ -206,7 +206,7 @@ export async function renderPlayground() {
       decision,
       h("div", { class: "card-head" }, h("h3", {}, t("pg.decision"))),
       kv(t("pg.task"), c.task_label || "—"),
-      kv(t("pg.tier"), c.complexity?.tier ? h("span", { class: "badge tier-" + c.complexity.tier }, c.complexity.tier) : "—"),
+      kv(t("pg.tier"), c.complexity?.tier ? h("span", { class: "badge tier-" + c.complexity.tier }, trTier(c.complexity.tier)) : "—"),
       h(
         "div",
         { class: "kv", style: "display:block" },
diff --git a/web/js/views/routing.js b/web/js/views/routing.js
index 37f97b2..bccf7b5 100644
--- a/web/js/views/routing.js
+++ b/web/js/views/routing.js
@@ -1,6 +1,6 @@
 // Routing — tier editor (ordered model chips), default model, and policy.
 import { h, mount, toast } from "../ui.js";
-import { t } from "../i18n.js";
+import { t, trTier } from "../i18n.js";
 import { api } from "../api.js";
 import { appState } from "../app.js";
 
@@ -153,9 +153,9 @@ export async function renderRouting() {
       // подписи не наезжают, когда ручки рядом
       hMed.querySelector(".bands-val").classList.toggle("raised", me - lo < 0.09);
       mount(legend,
-        h("span", { class: "badge tier-low" }, `low ≤ ${lo.toFixed(2)}`),
-        h("span", { class: "badge tier-medium" }, `medium ≤ ${me.toFixed(2)}`),
-        h("span", { class: "badge tier-high" }, `high > ${me.toFixed(2)}`));
+        h("span", { class: "badge tier-low" }, `${trTier("low")} ≤ ${lo.toFixed(2)}`),
+        h("span", { class: "badge tier-medium" }, `${trTier("medium")} ≤ ${me.toFixed(2)}`),
+        h("span", { class: "badge tier-high" }, `${trTier("high")} > ${me.toFixed(2)}`));
       track.classList.toggle("disabled", !st.bands);
     }
 
@@ -211,7 +211,7 @@ export async function renderRouting() {
     return h(
       "div",
       { class: "tierrow" },
-      h("div", { class: "tname" }, h("span", { class: "badge tier-" + tier }, tier)),
+      h("div", { class: "tname" }, h("span", { class: "badge tier-" + tier }, trTier(tier))),
       chipEditor(st.tiers, tier)
     );
   }
@@ -254,7 +254,7 @@ export async function renderRouting() {
             "select",
             { class: "pair-tier", title: t("routing.tasks.tierHint") },
             h("option", { value: "any" }, t("routing.tasks.tierAny")),
-            ...Object.keys(st.tiers).map((tr) => h("option", { value: tr }, tr))
+            ...Object.keys(st.tiers).map((tr) => h("option", { value: tr }, trTier(tr)))
           );
           tierSel.value = p.tier;
           tierSel.addEventListener("change", () => { p.tier = tierSel.value; });