diff --git a/README.md b/README.md
index 156d996..15678e5 100644
--- a/README.md
+++ b/README.md
@@ -5,20 +5,30 @@ This is a python script that downloads localization strings and CI color informa
 
 ## Installation
 
-This uses the [pip](https://packaging.python.org/en/latest/key_projects/#pip) package manager for Python packages ([see guide](https://packaging.python.org/en/latest/tutorials/installing-packages/)). It depends on the [pyexcel-ods](https://pypi.org/project/pyexcel-ods/) package whick will be installed alongsite automatically when you run:
+This uses the [pip](https://packaging.python.org/en/latest/key_projects/#pip) package manager for Python packages ([see guide](https://packaging.python.org/en/latest/tutorials/installing-packages/)). It depends on the [pyexcel-ods](https://pypi.org/project/pyexcel-ods/) package which will be installed alongsite automatically when you run:
 
     pip install localization-sync
 
-Hint: It could be that you need to use `pip3` commant instead uf `pip`.
+Hint: It could be that you need to use `pip3` command instead of `pip`.
 
 ## Prerequisites
 
+### 1. Create a Google Sheet
+
 Create a Google Sheet document with sheets like [these](https://docs.google.com/spreadsheets/d/1672QPWDsxBtaX5hc5QgZhqBwLADMnPVEv7-wLB3g-ug):
 
 ![Example of a L10n table](Resources/sheet_l10n.png)
 ![Example of a colors table](Resources/sheet_colors.png)
 
-Publish the sheeet to the web by pressing __File -> Publish to the web__. Select __Whole Document__ and __Website__. This gives the script access to the public JSON API of Google Docs.
+Mind to __not__ add extra columns or rows at the top/left of your tables. I you need to do so, use `keyRow`/`keyColumn` parameters in config to inset the parsing of the table.
+
+### 2. Publish
+
+Publish the sheeet to the web by pressing __File -> Publish to the web__. Select __Whole Document__ and __Website__. This enables the script do export the contents of the sheet as ODS file.
+
+_Note_: We are using the export instead of the JSON API. Because this way there is no need for creating an API Key and using OAuth on the client (your) side.
+
+### 3. Get the ID
 
 Find the ID of your document by copying it from your browsers address bar.
 
diff --git a/Sources/data_sync.py b/Sources/data_sync.py
index 1878705..9168e8e 100644
--- a/Sources/data_sync.py
+++ b/Sources/data_sync.py
@@ -22,6 +22,8 @@
 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
+from array import array
+import enum
 import json
 import os
 import re
@@ -49,6 +51,18 @@ def link(uri, label=None):
     print("Could not import "+ link("https://pypi.org/project/pyexcel-ods/", "pyexcel-ods") +".\nPlease run: pip install pyexcel-ods")
     exit()
 
+CONF_L10N = "l10n"
+CONF_COLORS = "colors"
+CONF_SHEET_ID = "sheetId"
+CONF_OS = "os"
+CONF_SHEET_NAME = "sheetName"
+CONF_BASE_LANG = "baseLanguage"
+CONF_OUT_FOLDER = "outputFolder"
+CONF_FILE_NAME = "fileName"
+CONF_KEY_PREFIX = "keyPrefix"
+CONF_KEY_ROW = "keyRow"
+CONF_KEY_COL = "keyColumn"
+
 placeholderPattern = re.compile(r'{String([0-9]*)}|{Number([0-9]*)}')
 scriptRunPath = os.getcwd()
 scriptFileName = os.path.basename(__file__)
@@ -76,13 +90,41 @@ def loadDocument(spreadsheedId):
     shutil.rmtree(tempPath)
     return content
 
-def writeLocalizations(document, configuration):
-    rows = document[configuration["sheetName"]]
+# TRims stuff
+def trim(rows: list, firstRow: int, firstColumn: int) -> list:
+    trimmedRows = []
+    for rowIndex, row in enumerate(rows):
+        if rowIndex < firstRow:
+            continue
+        trimmedRow = []
+        for colIndex, col in enumerate(row):
+            if colIndex < firstColumn:
+                continue
+            trimmedRow.append(col)
+        trimmedRows.append(trimmedRow)
+    return trimmedRows
+
+def writeLocalizations(document: dict, configuration: dict):
+    # Set default values.
+    if (CONF_BASE_LANG not in configuration): configuration[CONF_BASE_LANG] = "en"
+    if (CONF_KEY_PREFIX not in configuration): configuration[CONF_KEY_PREFIX] = ""
+    keyRow: int = 0 if (CONF_KEY_ROW not in configuration) else int(configuration[CONF_KEY_ROW])
+    keyColumn: int = 0 if (CONF_KEY_COL not in configuration) else int(configuration[CONF_KEY_COL])
+
+    rows = trim(
+        rows=document[configuration[CONF_SHEET_NAME]], 
+        firstRow=keyRow, 
+        firstColumn=keyColumn
+    )
     languageCount = len(rows[0]) - 1
     print("Found %i languages." % languageCount)
 
     for languageColumn in range(1, 1 + languageCount):
-        languageKey = rows[0][languageColumn].replace(" ", "")
+        languageKey = rows[0][languageColumn].strip().lower()
+        if " " in languageKey:
+            print("\""+ languageKey +"\" is not a valid language key. Skipped processing. Please check your config!")
+            continue
+        print("Processing \""+ languageKey +"\" at column "+ str(languageColumn + keyColumn) +".")
         
         if configuration["os"] == "iOS":
             buildLocalizationIOS(rows, languageColumn, languageKey, configuration)
@@ -93,11 +135,9 @@ def writeLocalizations(document, configuration):
 def buildLocalizationIOS(rows, column, languageKey, configuration):
 
     # Prepare paths.
-    baseLanguage = "en" if ("baseLanguage" not in configuration) else configuration["baseLanguage"]
-    keyPrefix = "" if ("keyPrefix" not in configuration) else configuration["keyPrefix"]
-    languageFolderName = "Base" if (languageKey == baseLanguage) else languageKey
-    folderPath = configuration["outputFolder"] + "/" + languageFolderName + ".lproj"
-    fileName = configuration["fileName"] + ".strings"
+    languageFolderName = "Base" if (languageKey == configuration[CONF_BASE_LANG]) else languageKey
+    folderPath = configuration[CONF_OUT_FOLDER] + "/" + languageFolderName + ".lproj"
+    fileName = configuration[CONF_FILE_NAME] + ".strings"
     filePath = folderPath + "/" + fileName
 
     # Prepare file.
@@ -116,11 +156,11 @@ def buildLocalizationIOS(rows, column, languageKey, configuration):
             continue
 
         # Skip empty translations...
-        if not row[column]:
+        if not (column < len(row)) or (not row[column]):
             continue
 
         translation = placeholderPattern.sub("%@", row[column])
-        line = "\"%s\" = \"%s\";" % (keyPrefix + key, translation)
+        line = "\"%s\" = \"%s\";" % (configuration[CONF_KEY_PREFIX] + key, translation)
         # Check if the line is commented.
         if key.startswith(l10nCommentIdentifier):
             l10nWriteComment(line, outputFile)
@@ -135,11 +175,10 @@ def buildLocalizationIOS(rows, column, languageKey, configuration):
 def buildLocalizationAndroid(rows, column, languageKey, configuration):
 
     # Prepare paths.
-    isBaseLanguage = (configuration["baseLanguage"] == languageKey)
-    keyPrefix = "" if ("keyPrefix" not in configuration) else configuration["keyPrefix"]
+    isBaseLanguage = (configuration[CONF_BASE_LANG] == languageKey)
     languageFolderName = "values" if isBaseLanguage else "values-" + languageKey
-    folderPath = configuration["outputFolder"] + "/" + languageFolderName
-    fileName = configuration["fileName"] + ".xml"
+    folderPath = configuration[CONF_OUT_FOLDER] + "/" + languageFolderName
+    fileName = configuration[CONF_FILE_NAME] + ".xml"
     filePath = folderPath + "/" + fileName
 
     strings = []
@@ -153,10 +192,15 @@ def buildLocalizationAndroid(rows, column, languageKey, configuration):
         if key.startswith(l10nSectionTitleIdentifier):
             strings.append({key: ""})
             continue
+
+        # Skip empty translations...
+        if not (column < len(row)) or (not row[column]):
+            continue
+        
         # Skip comments.
         if key.startswith(l10nCommentIdentifier):
             continue
-        strings.append({keyPrefix + key: placeholderPattern.sub("%s", row[column])})
+        strings.append({configuration[CONF_KEY_PREFIX] + key: placeholderPattern.sub("%s", row[column])})
 
     outputFile = startFile(folderPath, filePath, fileName)
     outputFile.write(buildResourceXML(strings, "string"))
@@ -165,11 +209,11 @@ def buildLocalizationAndroid(rows, column, languageKey, configuration):
 
 def writeColors(document, configuration):
 
-    rows = document[configuration["sheetName"]]
+    rows = document[configuration[CONF_SHEET_NAME]]
     isAndroid = (configuration["os"] == "Android")
     fileExtension = ".xml" if isAndroid else ".json"
-    folderPath = configuration["outputFolder"]
-    fileName = configuration["fileName"] + fileExtension
+    folderPath = configuration[CONF_OUT_FOLDER]
+    fileName = configuration[CONF_FILE_NAME] + fileExtension
     filePath = folderPath + "/" + fileName
 
     colors = []
@@ -243,18 +287,21 @@ def xmlWriteSectionComment(sectionTitle):
 
 def run(config):
 
-    sheetId = config["sheetId"]
+    sheetId = config[CONF_SHEET_ID]
     try:
         document = loadDocument(sheetId)
 
-        for l10nConfig in config["l10n"]:
-            writeLocalizations(document, l10nConfig)
+        if CONF_L10N in config:
+            for l10nConfig in config[CONF_L10N]:
+                writeLocalizations(document, l10nConfig)
 
-        for colorConfig in config["colors"]:
-            writeColors(document, colorConfig)
+        if CONF_COLORS in config:
+            for colorConfig in config[CONF_COLORS]:
+                writeColors(document, colorConfig)
 
     except Exception as exc:
-        print("Cannot process sheet - Error: "+ exc)
+        print("Cannot process sheet - Error:")
+        print(exc)
 
 def main():
     # Parse config file and run tasks.