diff --git a/internal/c/libqb.cpp b/internal/c/libqb.cpp
index 1da206e5b..ccd74005c 100644
--- a/internal/c/libqb.cpp
+++ b/internal/c/libqb.cpp
@@ -14416,7 +14416,7 @@ void qbg_sub_window(float x1, float y1, float x2, float y2, int32 passed) {
     if (write_page->text)
         goto qbg_sub_window_error;
     if ((!(passed & 1)) && (passed & 2))
-        goto qbg_sub_window_error; // SCREEEN passed without any other arguements!
+        goto qbg_sub_window_error; // SCREEN passed without any other arguments!
 
     // backup current qbg_x & qbg_y coordinates relative to viewport, not window
     if (write_page->clipping_or_scaling == 2) {
@@ -23472,7 +23472,7 @@ float func__mousey(int32 context, int32 passed) {
 }
 
 int32 func__mousepipeopen() {
-    // creates a new mouse pipe, routing all mouse input into it before any preceeding pipes receive access to the data
+    // creates a new mouse pipe, routing all mouse input into it before any preceding pipes receive access to the data
 
     // create new queue
     int32 context = list_add(mouse_message_queue_handles);
@@ -28035,7 +28035,7 @@ expand_and_retry:
         if (errno != EAGAIN && errno != EWOULDBLOCK)
             tcp->connected = 0;
 #    endif
-    } else if (bytes == 0) { // graceful shutdown occured
+    } else if (bytes == 0) { // graceful shutdown occurred
         tcp->connected = 0;
     } else {
         stream->in_size += bytes;
diff --git a/internal/c/libqb/src/datetime.cpp b/internal/c/libqb/src/datetime.cpp
index cddc82aab..18e9f0b4e 100644
--- a/internal/c/libqb/src/datetime.cpp
+++ b/internal/c/libqb/src/datetime.cpp
@@ -49,7 +49,7 @@ int64_t GetTicks() { return ((((int64_t)clock()) * ((int64_t)1000)) / ((int64_t)
 static uint64_t millis_since_midnight() {
     auto currenttime = std::chrono::system_clock::now();
 
-    // Gives us the number of miliseconds past the current second
+    // Gives us the number of milliseconds past the current second
     uint64_t millis_only = std::chrono::duration_cast<std::chrono::milliseconds>(currenttime.time_since_epoch()).count() % 1000;
 
     // Convert to time_t and then hour/min/sec. localtime() takes the current
diff --git a/internal/c/libqb/src/glut-main-thread.cpp b/internal/c/libqb/src/glut-main-thread.cpp
index bd776cc93..4e4fa627e 100644
--- a/internal/c/libqb/src/glut-main-thread.cpp
+++ b/internal/c/libqb/src/glut-main-thread.cpp
@@ -177,7 +177,7 @@ void libqb_start_main_thread(int argc, char **argv) {
 // from that thread (not doing that can result in a segfault due to using GLUT
 // from two threads at the same time).
 //
-// This is acomplished by simply queuing a GLUT message that calls exit() for us.
+// This is accomplished by simply queuing a GLUT message that calls exit() for us.
 void libqb_exit(int exitcode)
 {
     // If GLUT isn't running then we're free to do the exit() call from here
diff --git a/internal/c/libqb/src/http.cpp b/internal/c/libqb/src/http.cpp
index e5ad91e61..8edaeb603 100644
--- a/internal/c/libqb/src/http.cpp
+++ b/internal/c/libqb/src/http.cpp
@@ -270,7 +270,7 @@ static void libqb_curl_thread_handler(void *arg) {
 static struct curl_state curl_state;
 static struct libqb_thread *curl_thread;
 
-// This callback services the data recevied from the http connection.
+// This callback services the data received from the http connection.
 static size_t receive_http_block(void *ptr, size_t size, size_t nmemb, void *data) {
     struct handle *handle = (struct handle *)data;
     size_t length = size * nmemb;
@@ -279,7 +279,7 @@ static size_t receive_http_block(void *ptr, size_t size, size_t nmemb, void *dat
 
     libqb_buffer_write(&handle->out, (const char *)ptr, length);
 
-    // The first time this connection starts to recieve data we fill out the
+    // The first time this connection starts to receive data we fill out the
     // connection info.
     __fillout_curl_info(handle);
 
@@ -304,8 +304,8 @@ int libqb_http_get_length(int id, size_t *length) {
     return 0;
 }
 
-// Waits for handle to have valid info, which is availiable after the
-// connection headers have been recieved.
+// Waits for handle to have valid info, which is available after the
+// connection headers have been received.
 static void wait_for_info(struct handle *handle) {
     struct completion comp;
 
diff --git a/internal/c/time64.c b/internal/c/time64.c
index fab8a9f6b..bbe192edf 100644
--- a/internal/c/time64.c
+++ b/internal/c/time64.c
@@ -103,7 +103,7 @@ t64 time_64(t64 *pt) {
             assert(abs((long)(t2 - (int)t)) <= 1);
 
         // the <=1 here is in case the seconds get incremented
-        // betweeen the GetSystemTime(..) call and the time(..) call
+        // between the GetSystemTime(..) call and the time(..) call
     }
 #endif
     if (pt)
diff --git a/internal/support/converter/QB45BIN.bas b/internal/support/converter/QB45BIN.bas
index a20c9daee..b5590c846 100644
--- a/internal/support/converter/QB45BIN.bas
+++ b/internal/support/converter/QB45BIN.bas
@@ -261,8 +261,8 @@ QB45TOKENS:
 ' followed by a word indicating the length of the token.
 '
 ' The final column is the parse rule itself. A token may have multiple
-' parse rules. Multiple parse rules may be specified on a seperate line
-' (without a PCODE or LENGTH field), or seperated by a pipe ('|') symbol.
+' parse rules. Multiple parse rules may be specified on a separate line
+' (without a PCODE or LENGTH field), or separated by a pipe ('|') symbol.
 '
 ' There is one important difference between the two methods. Some rules
 ' define a symbol which can be used to reference the rule, such as:
@@ -270,8 +270,8 @@ QB45TOKENS:
 '   declmod::=SHARED
 '
 ' If a pipe symbol is used, the next rule will inherit the "declmod" (or
-' whatever symbol), unless it exlicitly defines it's own. Rules defined
-' on seperate lines use the default symbol which, initially, is nothing, but
+' whatever symbol), unless it explicitly defines it's own. Rules defined
+' on separate lines use the default symbol which, initially, is nothing, but
 ' may be overridden using the ".default" directive. This is only really used
 ' in the second half of the rule list, where almost every token is an
 ' expression ('expr').
@@ -291,7 +291,7 @@ QB45TOKENS:
 '  {$-1}
 '  {rulename:$+1}
 '
-' The first type will be substituded for the text located 1 item from the
+' The first type will be substituted for the text located 1 item from the
 ' top of the parse stack. If the stack isn't that deep, it will be replaced
 ' with the null string.
 '
@@ -319,7 +319,7 @@ QB45TOKENS:
 '
 ' Format tokens usually have two '#' symbols, such as {##id(decl)}. The
 ' extra '#' causes the parser to re-scan the tag for other tags once it
-' has been subsituted, allowing these tags to generate stack tags which can
+' has been substituted, allowing these tags to generate stack tags which can
 ' then be parsed.
 '
 ' See the function GetTaggedItem for a list of tag names which can be used.
diff --git a/source/ide/ide_methods.bas b/source/ide/ide_methods.bas
index 98fd5d6a2..44c36fa74 100644
--- a/source/ide/ide_methods.bas
+++ b/source/ide/ide_methods.bas
@@ -3639,7 +3639,7 @@ FUNCTION ide2 (ignore)
                     IF x = 0 THEN x = x2
                     IF x2 = 0 THEN x2 = x
                     IF x2 < x THEN SWAP x, x2
-                    IF x2 > x + 1 THEN x2 = x 'if seperated by more than one character, they are seperate line terminators
+                    IF x2 > x + 1 THEN x2 = x 'if separated by more than one character, they are separate line terminators
                     'x to x2 is the range of the next line terminator (1 or 2 characters)
 
                     IF x THEN
diff --git a/source/qb64pe.bas b/source/qb64pe.bas
index f9ebb65c8..182fcb3c0 100644
--- a/source/qb64pe.bas
+++ b/source/qb64pe.bas
@@ -447,7 +447,7 @@ TYPE HashListItem
     NextItem AS LONG
     PrevItem AS LONG
     LastItem AS LONG 'note: this value is only valid on the first item in the list
-    'note: name is stored in a seperate array of strings
+    'note: name is stored in a separate array of strings
 END TYPE
 DIM SHARED HashFind_NextListItem AS LONG
 DIM SHARED HashFind_Reverse AS LONG
@@ -18510,7 +18510,7 @@ FUNCTION findid& (n2$)
     '(the above should never happen)
     findid& = 2 '2=not finished searching all indexes
 
-    'seperate symbol from name (if a symbol has been added), this is the only way symbols can be passed to findid
+    'separate symbol from name (if a symbol has been added), this is the only way symbols can be passed to findid
     i = 0
     i = INSTR(n$, "~"): IF i THEN GOTO gotsc
     i = INSTR(n$, "`"): IF i THEN GOTO gotsc
diff --git a/tests/c/buffer.cpp b/tests/c/buffer.cpp
index 3a89c842b..236d1f9c7 100644
--- a/tests/c/buffer.cpp
+++ b/tests/c/buffer.cpp
@@ -29,7 +29,7 @@ void test_single_rw() {
     libqb_buffer_clear(&buffer);
 }
 
-// Multple writes and reads of the same size from the buffer
+// Multiple writes and reads of the same size from the buffer
 void test_multiple_rw() {
     int count = 10;
     struct libqb_buffer buffer;