diff --git a/addons/addon-ligatures/src/index.ts b/addons/addon-ligatures/src/index.ts
index fb8e85e73..2fc664f5b 100644
--- a/addons/addon-ligatures/src/index.ts
+++ b/addons/addon-ligatures/src/index.ts
@@ -21,7 +21,7 @@ const CACHE_SIZE = 100000;
 
 /**
  * Enable ligature support for the provided Terminal instance. To function
- * properly, this must be called after `open()` is called on the therminal. If
+ * properly, this must be called after `open()` is called on the terminal. If
  * the font currently in use supports ligatures, the terminal will automatically
  * start to render them.
  * @param term Terminal instance from xterm.js
diff --git a/addons/addon-serialize/src/SerializeAddon.ts b/addons/addon-serialize/src/SerializeAddon.ts
index 26ede1c41..e1728feb2 100644
--- a/addons/addon-serialize/src/SerializeAddon.ts
+++ b/addons/addon-serialize/src/SerializeAddon.ts
@@ -221,7 +221,7 @@ class StringSerializeHandler extends BaseSerializeHandler {
             // you can't use control sequence to move cursor to (x === row)
             (thisRowLastChar.getChars() || thisRowLastChar.getWidth() === 0) &&
             // change background of the first wrapped cell also affects BCE
-            // so we mark it as invalid to simply the process to determine line separator
+            // so we mark it as invalid to simplify the process to determine line separator
             equalBg(thisRowLastChar, nextRowFirstChar)
           ) {
             isValid = true;
@@ -233,7 +233,7 @@ class StringSerializeHandler extends BaseSerializeHandler {
             isNextRowFirstCharDoubleWidth &&
             (thisRowLastSecondChar.getChars() || thisRowLastSecondChar.getWidth() === 0) &&
             // change background of the first wrapped cell also affects BCE
-            // so we mark it as invalid to simply the process to determine line separator
+            // so we mark it as invalid to simplify the process to determine line separator
             equalBg(thisRowLastChar, nextRowFirstChar) &&
             equalBg(thisRowLastSecondChar, nextRowFirstChar)
           ) {
diff --git a/src/browser/renderer/dom/DomRenderer.ts b/src/browser/renderer/dom/DomRenderer.ts
index 7623ee356..2771c79d7 100644
--- a/src/browser/renderer/dom/DomRenderer.ts
+++ b/src/browser/renderer/dom/DomRenderer.ts
@@ -430,7 +430,7 @@ export class DomRenderer extends Disposable implements IRenderer {
         documentFragment.appendChild(this._createSelectionElement(viewportCappedStartRow + 1, 0, this._bufferService.cols, middleRowsCount));
         // Draw final row
         if (viewportCappedStartRow !== viewportCappedEndRow) {
-          // Only draw viewportEndRow if it's not the same as viewporttartRow
+          // Only draw viewportEndRow if it's not the same as viewportStartRow
           const finalEndCol = viewportEndRow === viewportCappedEndRow ? end[0] : this._bufferService.cols;
           documentFragment.appendChild(this._createSelectionElement(viewportCappedEndRow, 0, finalEndCol));
         }
diff --git a/src/common/buffer/Constants.ts b/src/common/buffer/Constants.ts
index 5ce075cf7..9f21dbc5a 100644
--- a/src/common/buffer/Constants.ts
+++ b/src/common/buffer/Constants.ts
@@ -44,7 +44,7 @@ export const enum Content {
   CODEPOINT_MASK = 0x1FFFFF,
 
   /**
-   * bit 22       flag indication whether a cell contains combined content
+   * bit 22       flag indicating whether a cell contains combined content
    *              read:   `isCombined = content & Content.isCombined;`
    *              set:    `content |= Content.isCombined;`
    *              clear:  `content &= ~Content.isCombined;`