if you switch the languages in App Inventor, the local variable names will not get converted, you have to adjust them manually

for the second error see the frequently made errors here
you might want to quotify the column names if you use spaces in these names
Taifun
PS: and next time if you want to add a screenshot:
====================== Screen Capture +++++++++++++
On Windows Ctr + PrtScn keyboard keys pressed at same time copies an image of the screen to the Windows Clipboard. Open Paint and save the image by placing the contents of the clipboard into Paint. Save the image to your desktop or another folder as a png or jpg file. On Win 7 and above you can use the Snipping tool (in Accessories) to capture an image of blocks directly from the screen. Capture what you need and Save the file to a folder on your PC.
On a Mac, command-shift-3 (whole-screen) or command-shift-4 (drag a rectangle) to take a screenshot. The image file will appear on your desktop.
To post an image to the forum: Once you copy an image and named it something like capturedimage.png and you have put it in a folder on your PC; find the blue Insert Image control in the forum text area (the blue icon is next to and left of the Link). Press the icon. A small screen opens..drag the capturedimage.png to the new screen; wait a few seconds while Google's forum loads the image to the text area. Now the image is in the forum's text box area, ready to post.
Please save the images as a jpg or png file. Other formats are possible but create problems for some forum members in reading your images.