diff --git a/common/protob/messages-management.proto b/common/protob/messages-management.proto
index 1a14d7036..539ad4fc1 100644
--- a/common/protob/messages-management.proto
+++ b/common/protob/messages-management.proto
@@ -181,7 +181,7 @@ message ApplySettings {
 }
 
 /**
- * Request: change the device language via translation data
+ * Request: change the device language via translation data.
  * Does not send the translation data itself, as they are too large for one message.
  * Device will request the translation data in chunks.
  * @start
@@ -189,7 +189,7 @@ message ApplySettings {
  * @next Failure
  */
 message ChangeLanguage {
-    required uint32 data_length = 1;   // byte length of the whole translation blob (set to 0 for default language)
+    required uint32 data_length = 1;   // byte length of the whole translation blob (set to 0 for default language - english)
 }
 
 /**
@@ -198,7 +198,7 @@ message ChangeLanguage {
  * @next TranslationDataAck
  */
  message TranslationDataRequest {
-    required uint32 data_length = 1;    // Number of bytes being requested (<= 1024)
+    required uint32 data_length = 1;    // Number of bytes being requested
     required uint32 data_offset = 2;    // Offset of the first byte being requested
 }
 
@@ -208,7 +208,7 @@ message ChangeLanguage {
  * @next Success
  */
 message TranslationDataAck {
-    required bytes data_chunk = 1;  // Bytes from translation payload (<= 1024 bytes)
+    required bytes data_chunk = 1;  // Bytes from translation payload
 }
 
 /**
diff --git a/core/embed/extmod/modtrezorconfig/modtrezorconfig.c b/core/embed/extmod/modtrezorconfig/modtrezorconfig.c
index 02bcbe8d5..4678cd0fc 100644
--- a/core/embed/extmod/modtrezorconfig/modtrezorconfig.c
+++ b/core/embed/extmod/modtrezorconfig/modtrezorconfig.c
@@ -17,7 +17,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <stdio.h>
 #include <string.h>
 
 #include "py/mphal.h"
@@ -340,7 +339,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_trezorconfig_translations_set_obj,
 
 /// def translations_wipe() -> None:
 ///     """
-///     Wipe all the translations data before writing a new one
+///     Wipe all the translations data before writing a new one.
 ///     """
 STATIC mp_obj_t mod_trezorconfig_translations_wipe(void) {
   translations_erase();
@@ -351,7 +350,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_0(mod_trezorconfig_translations_wipe_obj,
 
 /// def translations_max_bytesize() -> int:
 ///     """
-///     How much is the maximum bytesize of translations data
+///     How much is the maximum bytesize of translations data.
 ///     """
 STATIC mp_obj_t mod_trezorconfig_translations_max_bytesize(void) {
   uint32_t count = translations_area_bytesize();
diff --git a/core/embed/lib/fonts/font_unifont_regular_16.c b/core/embed/lib/fonts/font_unifont_regular_16.c
index bb0607f1b..8ef83037c 100644
--- a/core/embed/lib/fonts/font_unifont_regular_16.c
+++ b/core/embed/lib/fonts/font_unifont_regular_16.c
@@ -104,7 +104,7 @@
 /* { */ static const uint8_t Font_Unifont_Regular_16_glyph_123[] = { 4, 13, 7, 1, 11, 52, 66, 36, 132, 34, 68, 48 };
 /* | */ static const uint8_t Font_Unifont_Regular_16_glyph_124[] = { 1, 14, 7, 3, 12, 255, 252 };
 /* } */ static const uint8_t Font_Unifont_Regular_16_glyph_125[] = { 4, 13, 7, 1, 11, 194, 36, 66, 18, 68, 34, 192 };
-/* ~ */ static const uint8_t Font_Unifont_Regular_16_glyph_126[] = { 7, 3, 7, 0, 11, 99, 38, 48 };
+/* ~ */ static const uint8_t Font_Unifont_Regular_16_glyph_126[] = { 7, 3, 8, 0, 11, 99, 38, 48 };  // < --- advanced changed from 7 to 8
 
 /* ? */ const uint8_t Font_Unifont_Regular_16_glyph_nonprintable[] = { 6, 10, 7, 0, 10, 133, 231, 190, 247, 190, 255, 239, 191 };
 
diff --git a/core/embed/lib/fonts/fonts.c b/core/embed/lib/fonts/fonts.c
index eaf4db350..936139fdf 100644
--- a/core/embed/lib/fonts/fonts.c
+++ b/core/embed/lib/fonts/fonts.c
@@ -19,7 +19,7 @@
 
 #include "fonts.h"
 #include <stdbool.h>
-#include <stdio.h>
+#include <stddef.h>
 #ifdef TRANSLATIONS
 #include "librust_fonts.h"
 #endif
@@ -139,8 +139,8 @@ int font_baseline(int font) {
 
 const uint8_t *font_get_glyph(int font, uint8_t c) {
   uint16_t c_2bytes = convert_char_utf8(c);
-  bool is_printable = c_2bytes != 0x7F;
   if (!c_2bytes) return 0;
+  bool is_printable = c_2bytes != 0x7F;
 
 #ifdef TRANSLATIONS
   // found UTF8 character
@@ -148,6 +148,8 @@ const uint8_t *font_get_glyph(int font, uint8_t c) {
   // embedded blob
   if (c_2bytes > 0xFF) {
     PointerData glyph_data = get_utf8_glyph(c_2bytes, font);
+    // TODO: is it better to use (!glyph_data.ptr) or (glyph_data.ptr == NULL)?
+    // first one does not require import
     if (glyph_data.ptr != NULL) {
       return glyph_data.ptr;
     } else {
diff --git a/core/embed/models/model_T2T1_layout.c b/core/embed/models/model_T2T1_layout.c
index 65932add5..7d26440cc 100644
--- a/core/embed/models/model_T2T1_layout.c
+++ b/core/embed/models/model_T2T1_layout.c
@@ -33,7 +33,6 @@ const flash_area_t TRANSLATIONS_AREA = {
     .num_subareas = 1,
     .subarea[0] =
         {
-            // TODO: can we use the 4th sector?
             .first_sector = 12,
             .num_sectors = 3,
         },
diff --git a/core/embed/rust/librust_fonts.h b/core/embed/rust/librust_fonts.h
index d21cc14b5..a04a0bf54 100644
--- a/core/embed/rust/librust_fonts.h
+++ b/core/embed/rust/librust_fonts.h
@@ -3,4 +3,5 @@ typedef struct {
   uint32_t len;
 } PointerData;
 
+// TODO: Theoretically, the `len` is not used by the client and does not have to be sent
 PointerData get_utf8_glyph(uint16_t char_code, int font);
diff --git a/core/embed/trezorhal/translations.h b/core/embed/trezorhal/translations.h
index bf82d1859..fad837615 100644
--- a/core/embed/trezorhal/translations.h
+++ b/core/embed/trezorhal/translations.h
@@ -1,6 +1,4 @@
-
 #include <stdint.h>
-#include "secbool.h"
 
 void translations_write(uint8_t* data, uint32_t offset, uint32_t len);
 
diff --git a/core/mocks/generated/trezorconfig.pyi b/core/mocks/generated/trezorconfig.pyi
index 9f554abbe..d8f677716 100644
--- a/core/mocks/generated/trezorconfig.pyi
+++ b/core/mocks/generated/trezorconfig.pyi
@@ -118,14 +118,14 @@ def translations_set(blob: bytes, offset: int) -> None:
 # extmod/modtrezorconfig/modtrezorconfig.c
 def translations_wipe() -> None:
     """
-    Wipe all the translations data before writing a new one
+    Wipe all the translations data before writing a new one.
     """
 
 
 # extmod/modtrezorconfig/modtrezorconfig.c
 def translations_max_bytesize() -> int:
     """
-    How much is the maximum bytesize of translations data
+    How much is the maximum bytesize of translations data.
     """