diff --git a/pages/tokipona/0.md b/pages/tokipona/0.md
index c04e2f1..2d0166f 100644
--- a/pages/tokipona/0.md
+++ b/pages/tokipona/0.md
@@ -53,7 +53,7 @@ All toki pona words are pronounced with stress on their first syllable.
 Here are some toki pona words that are derived from, or sound similar to, other
 English words:
 
-| toki pona | sounds similar to |
+| toki pona | derived from and sounds similar to |
 |-----------|-------------------|
 | jaki      | yucky             |
 | jelo      | yellow            |
@@ -64,4 +64,20 @@ English words:
 | tu        | two               |
 | wan       | one               |
 
+| toki pona | sounds similar to (may depend on your dialect) |
+|-----------|-------------------|
+| jan       | young             |
+| jo        | yo!               |
+| kama      | comma             |
+| lukin     | looking           |
+| pan       | pun               |
+| sama      | summer            |
+| sin       | seen              |
+
 [Top page](index.html) [Next page](1.html)
+
+---
+
+While trying to create an original unofficial course, I ended up making this
+page's contents similar to those in the [**official book by Sonja
+Lang**](https://tokipona.org/). I recommend everyone check it out.
diff --git a/pages/tokipona/12.md b/pages/tokipona/12.md
index bf5331a..ca20884 100644
--- a/pages/tokipona/12.md
+++ b/pages/tokipona/12.md
@@ -44,7 +44,8 @@ But, when added at the beginning of a sentence, it means "but" or "however":
 
 In the official dictionary, "pu" is only defined as "interacting with the
 official Toki Pona book". Usage of this word as "the official Toki Pona book"
-itself, while common among some users, is unofficial. 
+itself, while common among some users, is unofficial. Sonja Lang personally
+uses the noun phrase "lipu pu" to refer to the official book itself.
 
 ## Exercises
 
diff --git a/pages/tokipona/4.md b/pages/tokipona/4.md
index b1d9c04..3f95cf0 100644
--- a/pages/tokipona/4.md
+++ b/pages/tokipona/4.md
@@ -63,6 +63,10 @@ While this is sometimes considered a rather unconventional use of the particle
 "e" for some, it is less ambiguous and more flexible. For clarity's sake, this
 option will be used throughout the course.
 
+Sonja Lang uses the preposition "lon" in this situation:
+
+> mi toki lon ijo. -- I talk about something.
+
 ## Example sentences
 
 And here's some sentences that use interesting phrases.
diff --git a/pages/tokipona/credits.md b/pages/tokipona/credits.md
index 991fe93..9141a79 100644
--- a/pages/tokipona/credits.md
+++ b/pages/tokipona/credits.md
@@ -19,6 +19,9 @@ course:
   for suggesting a grammar fix on the chess page and submitting a pull request
   that fixed typos on several pages
 
+* **jan Sonja** (Sonja Lang) for, well, creating toki pona itself, as well as
+  suggesting important changes to pages 0, 4 and x1.
+
 Special thanks:
 
 * **jan Misali** (Mitch Halley) for creating the "Conlang Critic" web series,
@@ -27,6 +30,4 @@ Special thanks:
 * the participants of the **ma pona pi toki pona** Discord server and the
   **toki pona** Telegram group
 
-* **jan Sonja** (Sonja Lang) for, well, creating toki pona itself
-
 [Top page](index.html)
diff --git a/pages/tokipona/index.md b/pages/tokipona/index.md
index 2f6a3f1..3744a17 100644
--- a/pages/tokipona/index.md
+++ b/pages/tokipona/index.md
@@ -42,8 +42,8 @@ vocabulary features words borrowed from many languages across the world.
 # About this course
 
 There are several good sources for learning toki pona available already. The
-most important (and best, in my opinion), is the [official toki pona
-book](https://tokipona.org/) (also known as "pu") published in 2014 by Sonja
+most important (and best, in my opinion), is the [**official toki pona
+book**](https://tokipona.org/) (also known as "pu") published in 2014 by Sonja
 Lang herself. It is not free, but it's a well-written book with lots of
 additional texts to read, and it explains the language very well.
 
diff --git a/pages/tokipona/ru_12.md b/pages/tokipona/ru_12.md
index 36e3a8e..f4ef9e6 100644
--- a/pages/tokipona/ru_12.md
+++ b/pages/tokipona/ru_12.md
@@ -44,7 +44,8 @@
 
 В официальной книге, слово "pu" определено только как "взаимодействовать с
 офциальной книгой о языке токи пона", но использование этого слова в роли
-существительного широко распространено.
+существительного широко распространено. Соня Лэнг предпочитает называть свою
+официальную книгу фразой "lipu pu".
 
 ## Упражнения
 
diff --git a/pages/tokipona/ru_4.md b/pages/tokipona/ru_4.md
index 2f4cb71..782800e 100644
--- a/pages/tokipona/ru_4.md
+++ b/pages/tokipona/ru_4.md
@@ -61,6 +61,10 @@ ike" -- "плохо говорить" или "разговаривать о зл
 для прямых дополнений, а не предложных, но он намного более гибкий и понятный. В
 этом курсе именно этот метод будет использоваться в дальнейшем.
 
+Соня Лэнг использует в этих целях предлог "lon":
+
+> mi toki lon ijo. -- Я говорю о чем-то.
+
 ## Примеры предложений
 
 Вот несколько примеров предложений с интересными фразами.
diff --git a/pages/tokipona/ru_x1.md b/pages/tokipona/ru_x1.md
index 0b6546d..53a8c02 100644
--- a/pages/tokipona/ru_x1.md
+++ b/pages/tokipona/ru_x1.md
@@ -85,11 +85,13 @@
 
 > tenpo mute la ona mute li lon. -- Они существовали очень долго.
 
-Слово "pasila" обозначало "простой", но его очень рано совместили с "pona".
+Слово "pasila" обозначало "простой", но его совместили с "pona" ещё до выхода
+первой публичной веб-версии языка токи пона в 2001 году.
 
-Слово "pake", от английского "block", обозначало "остановить, прекратить", но
-оно было удалено, так как его смысл можно передать либо с "pini" (остановить,
-закончить), либо с "awen" (держать, оставаться).
+Слово "pake", от акадийско-французского "barrer" ("закрывать на замок"),
+обозначало "остановить, прекратить", но оно было удалено, так как его смысл
+можно передать либо с "pini" (остановить, закончить), либо с "awen" (держать,
+оставаться).
 
 Слово "pata" значит "брат" или "сестра", но его смысл щас передаётся как "jan
 sama".
diff --git a/pages/tokipona/x1.md b/pages/tokipona/x1.md
index 8a04184..ce68401 100644
--- a/pages/tokipona/x1.md
+++ b/pages/tokipona/x1.md
@@ -89,12 +89,13 @@ it doesn't seem to be commonly used anymore. For example:
 
 > tenpo mute la ona mute li lon. -- They have existed for a long time.
 
-The word "pasila" was a separate word for "easy", but it was merged into "pona"
-a long time ago.
+The word "pasila" was a separate word for "easy", but it was removed from toki
+pona's vocabulary before the first public web version was even released in 2001.
 
 The word "pake" was a verb meaning "to stop, to cease" and derived from the
-English word "block", but it was removed, probably as its meaning could be
-expressed with either "pini" (to stop, to finish) or "awen" (to keep, to stay).
+Acadian French word "barrer" (meaning "to lock"), but it was removed, probably
+as its meaning could be expressed with either "pini" (to stop, to finish) or
+"awen" (to keep, to stay).
 
 The word "pata" used to mean "sibling", but now it's commonly expressed as "jan
 sama" instead.