diff --git a/ext/bg/data/dictionary-index-schema.json b/ext/bg/data/dictionary-index-schema.json
new file mode 100644
index 00000000..9865fcc1
--- /dev/null
+++ b/ext/bg/data/dictionary-index-schema.json
@@ -0,0 +1,40 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "object",
+    "description": "Index file containing information about the data contained in the dictionary.",
+    "required": [
+        "title",
+        "revision"
+    ],
+    "properties": {
+        "title": {
+            "type": "string",
+            "description": "Title of the dictionary."
+        },
+        "revision": {
+            "type": "string",
+            "description": "Revision of the dictionary. This value is only used for displaying information."
+        },
+        "sequenced": {
+            "type": "boolean",
+            "default": false,
+            "description": "Whether or not this dictionary can be used as the primary dictionary. Primary dictionaries typically contain term/expression definitions."
+        },
+        "format": {
+            "type": "integer",
+            "description": "Format of data found in the JSON data files."
+        },
+        "version": {
+            "type": "integer",
+            "description": "Alias for format."
+        }
+    },
+    "anyOf": [
+        {
+            "required": ["format"]
+        },
+        {
+            "required": ["version"]
+        }
+    ]
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-kanji-bank-v1-schema.json b/ext/bg/data/dictionary-kanji-bank-v1-schema.json
new file mode 100644
index 00000000..6dad5a7a
--- /dev/null
+++ b/ext/bg/data/dictionary-kanji-bank-v1-schema.json
@@ -0,0 +1,33 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Data file containing kanji information.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Information about a single kanji character.",
+        "minItems": 4,
+        "items": [
+            {
+                "type": "string",
+                "description": "Kanji character.",
+                "minLength": 1
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated onyomi readings for the kanji character. An empty string is treated as no readings."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated kunyomi readings for the kanji character. An empty string is treated as no readings."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated tags for the kanji character. An empty string is treated as no tags."
+            }
+        ],
+        "additionalItems": {
+            "type": "string",
+            "description": "A meaning for the kanji character."
+        }
+    }
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-kanji-bank-v3-schema.json b/ext/bg/data/dictionary-kanji-bank-v3-schema.json
new file mode 100644
index 00000000..a5b82039
--- /dev/null
+++ b/ext/bg/data/dictionary-kanji-bank-v3-schema.json
@@ -0,0 +1,44 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Data file containing kanji information.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Information about a single kanji character.",
+        "minItems": 6,
+        "items": [
+            {
+                "type": "string",
+                "description": "Kanji character.",
+                "minLength": 1
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated onyomi readings for the kanji character. An empty string is treated as no readings."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated kunyomi readings for the kanji character. An empty string is treated as no readings."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated tags for the kanji character. An empty string is treated as no tags."
+            },
+            {
+                "type": "array",
+                "description": "Array of meanings for the kanji character.",
+                "items": {
+                    "type": "string",
+                    "description": "A meaning for the kanji character."
+                }
+            },
+            {
+                "type": "object",
+                "description": "Various stats for the kanji character.",
+                "additionalProperties": {
+                    "type": "string"
+                }
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-kanji-meta-bank-v3-schema.json b/ext/bg/data/dictionary-kanji-meta-bank-v3-schema.json
new file mode 100644
index 00000000..62479026
--- /dev/null
+++ b/ext/bg/data/dictionary-kanji-meta-bank-v3-schema.json
@@ -0,0 +1,25 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Custom metadata for kanji characters.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Metadata about a single kanji character.",
+        "minItems": 3,
+        "items": [
+            {
+                "type": "string",
+                "minLength": 1
+            },
+            {
+                "type": "string",
+                "enum": ["freq"],
+                "description": "Type of data. \"freq\" corresponds to frequency information."
+            },
+            {
+                "type": ["string", "number"],
+                "description": "Data for the character."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-tag-bank-v3-schema.json b/ext/bg/data/dictionary-tag-bank-v3-schema.json
new file mode 100644
index 00000000..ee5ca64d
--- /dev/null
+++ b/ext/bg/data/dictionary-tag-bank-v3-schema.json
@@ -0,0 +1,32 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Data file containing tag information for terms and kanji.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Information about a single tag.",
+        "minItems": 5,
+        "items": [
+            {
+                "type": "string",
+                "description": "Tag name."
+            },
+            {
+                "type": "string",
+                "description": "Category for the tag."
+            },
+            {
+                "type": "number",
+                "description": "Sorting order for the tag."
+            },
+            {
+                "type": "string",
+                "description": "Notes for the tag."
+            },
+            {
+                "type": "number",
+                "description": "Score used to determine popularity. Negative values are more rare and positive values are more frequent. This score is also used to sort search results."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-term-bank-v1-schema.json b/ext/bg/data/dictionary-term-bank-v1-schema.json
new file mode 100644
index 00000000..6ffb26e6
--- /dev/null
+++ b/ext/bg/data/dictionary-term-bank-v1-schema.json
@@ -0,0 +1,36 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Data file containing term and expression information.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Information about a single term/expression.",
+        "minItems": 5,
+        "items": [
+            {
+                "type": "string",
+                "description": "Term or expression."
+            },
+            {
+                "type": "string",
+                "description": "Reading of the term/expression, or an empty string if the reading is the same as the term/expression."
+            },
+            {
+                "type": ["string", "null"],
+                "description": "String of space-separated tags for the definition. An empty string is treated as no tags."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated rule identifiers for the definition which is used to validate delinflection. Valid rule identifiers are: v1: ichidan verb; v5: godan verb; vs: suru verb; vk: kuru verb; adj-i: i-adjective. An empty string corresponds to words which aren't inflected, such as nouns."
+            },
+            {
+                "type": "number",
+                "description": "Score used to determine popularity. Negative values are more rare and positive values are more frequent. This score is also used to sort search results."
+            }
+        ],
+        "additionalItems": {
+            "type": "string",
+            "description": "Single definition for the term/expression."
+        }
+    }
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-term-bank-v3-schema.json b/ext/bg/data/dictionary-term-bank-v3-schema.json
new file mode 100644
index 00000000..bb982e36
--- /dev/null
+++ b/ext/bg/data/dictionary-term-bank-v3-schema.json
@@ -0,0 +1,48 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Data file containing term and expression information.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Information about a single term/expression.",
+        "minItems": 8,
+        "items": [
+            {
+                "type": "string",
+                "description": "Term or expression."
+            },
+            {
+                "type": "string",
+                "description": "Reading of the term/expression, or an empty string if the reading is the same as the term/expression."
+            },
+            {
+                "type": ["string", "null"],
+                "description": "String of space-separated tags for the definition. An empty string is treated as no tags."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated rule identifiers for the definition which is used to validate delinflection. Valid rule identifiers are: v1: ichidan verb; v5: godan verb; vs: suru verb; vk: kuru verb; adj-i: i-adjective. An empty string corresponds to words which aren't inflected, such as nouns."
+            },
+            {
+                "type": "number",
+                "description": "Score used to determine popularity. Negative values are more rare and positive values are more frequent. This score is also used to sort search results."
+            },
+            {
+                "type": "array",
+                "description": "Array of definitions for the term/expression.",
+                "items": {
+                    "type": "string",
+                    "description": "Single definition for the term/expression."
+                }
+            },
+            {
+                "type": "integer",
+                "description": "Sequence number for the term/expression. Terms/expressions with the same sequence number can be shown together when the \"resultOutputMode\" option is set to \"merge\"."
+            },
+            {
+                "type": "string",
+                "description": "String of space-separated tags for the term/expression. An empty string is treated as no tags."
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/ext/bg/data/dictionary-term-meta-bank-v3-schema.json b/ext/bg/data/dictionary-term-meta-bank-v3-schema.json
new file mode 100644
index 00000000..1cc0557f
--- /dev/null
+++ b/ext/bg/data/dictionary-term-meta-bank-v3-schema.json
@@ -0,0 +1,25 @@
+{
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "type": "array",
+    "description": "Custom metadata for terms/expressions.",
+    "additionalItems": {
+        "type": "array",
+        "description": "Metadata about a single term/expression.",
+        "minItems": 3,
+        "items": [
+            {
+                "type": "string",
+                "description": "Term or expression."
+            },
+            {
+                "type": "string",
+                "enum": ["freq"],
+                "description": "Type of data. \"freq\" corresponds to frequency information."
+            },
+            {
+                "type": ["string", "number"],
+                "description": "Data for the term/expression."
+            }
+        ]
+    }
+}
\ No newline at end of file