diff --git a/.translate/state/need_for_speed.md.yml b/.translate/state/need_for_speed.md.yml
index 8cf8a4b..5235dbd 100644
--- a/.translate/state/need_for_speed.md.yml
+++ b/.translate/state/need_for_speed.md.yml
@@ -1,6 +1,6 @@
-source-sha: 06af1a96c7a831653842bc655bbff3192f0b6f82
-synced-at: "2026-05-05"
-model: claude-sonnet-4-6
+source-sha: 69ce7e5fd6dba5924d2e148742be60f81c205934
+synced-at: "2026-09-12"
+model: claude-sonnet-5
 mode: UPDATE
 section-count: 5
-tool-version: 0.14.1
+tool-version: 0.28.0
diff --git a/.translate/state/polars.md.yml b/.translate/state/polars.md.yml
index 81b3af0..9e7bec0 100644
--- a/.translate/state/polars.md.yml
+++ b/.translate/state/polars.md.yml
@@ -1,6 +1,6 @@
-source-sha: 55c87c9fdbdb522866c5b6bbdc65c073941d7f16
-synced-at: "2026-08-18"
+source-sha: 69ce7e5fd6dba5924d2e148742be60f81c205934
+synced-at: "2026-09-12"
 model: claude-sonnet-5
 mode: UPDATE
 section-count: 6
-tool-version: 0.26.0
+tool-version: 0.28.0
diff --git a/lectures/need_for_speed.md b/lectures/need_for_speed.md
index ce97834..41a954f 100644
--- a/lectures/need_for_speed.md
+++ b/lectures/need_for_speed.md
@@ -36,14 +36,6 @@ translation:
 ---
 
 (speed)=
-```{raw} jupyter
-<div id="qe-notebook-header" align="right" style="text-align:right;">
-        <a href="https://quantecon.org/" title="quantecon.org">
-                <img style="width:250px;display:inline;" width="250px" src="https://assets.quantecon.org/img/qe-menubar-logo.svg" alt="QuantEcon">
-        </a>
-</div>
-```
-
 # پایتون برای محاسبات علمی
 
 ```{epigraph}
diff --git a/lectures/polars.md b/lectures/polars.md
index dca820f..3bb25d2 100644
--- a/lectures/polars.md
+++ b/lectures/polars.md
@@ -29,14 +29,6 @@ translation:
 ---
 
 (pl)=
-```{raw} jupyter
-<div id="qe-notebook-header" align="right" style="text-align:right;">
-        <a href="https://quantecon.org/" title="quantecon.org">
-                <img style="width:250px;display:inline;" width="250px" src="https://assets.quantecon.org/img/qe-menubar-logo.svg" alt="QuantEcon">
-        </a>
-</div>
-```
-
 # Polars
 
 ```{index} single: Python; Polars