naah. I have it on good authority he is his own translator and just too modest to let anyone know the number of languages he speaks. But I do believe Kirk began his language pursuits by studying menus (LOL)!
Oh, my! This is a tall order for a western city. There is no area that has all of your requirements so you will need to prioritize. As everyone will have there own opinion, I will do my best to share the facts i've gathered in the last 20 years of living here.
First, constraints. Cars are a requirement in the west due to the way the cities grew and developed through the years. Any central area, say like Gramery Park in NY City or Beacon Hill in Boston, was long ago bulldozed for skyscrapers and the residents moved, mainly north of downtown. Like many western cities, it is a city of suburbs that have been absorded over the years and distant towns that are now suburbs. Also, I'm assuming money is an object and that will drive your decisions as it will in most cities.
In mulling over the best way to communicate a lot of information quickly, I'll give an outlline of the major neighborhoods for you to explore while visiting. There are sooo many and the people in each area drive the personality of the community, so I will try to simplify and hit my favorites. Okay, the other thing to know is that there is no where I would want to live that is near (walkable to) SW'ern - which is on Harry Hines, an old industrial road/highway that is in various levels of distress.
Forest Hills (in East Dallas)- my personal favorite; small area east of White Rock Lake Park - and walking distance to the lake (the best walking, biking area in Dallas); the houses are all unique and range in style from Tudor to Mediteranean to Contemporary ranch; Tom Thumb, worth the drive to Central Market (W); Casa Linda Shopping Center; the biggest issue I have is there are just not many good restaurants within walking or short driving distance.
Lakewood (in the area between Skillman and the lake) - my second favorite; area west of White Rock Lake; beautiful houses build in the 20's to current (some teardowns or newly built); very walkable; it has hills!; Tom Thumb, Whole Foods on Greenville, Central Market to the north; funky shopping and eating areas are a short drive to Lakewood Village or Greenville Avenue (foodie area basically stretches from Ross (on the S) to Mockingbird (on the North)
Swiss Avenue Historic District (W of Lakewood) - I love this area (and have lived there) which is built on a median greenbelt running the length of the district. I used to run on Swiss daily and it is popular with people in the area. The spirit is of the "urban pioneer." Munger Place is nice too but again you need a pioneer spirit. Whole Foods on Greenville, Minyards on Gaston; Lakewood Village, Greenville Ave or drive to Uptown and North Park Mall.
AREAS CLOSEST TO SW'ern -
University Park(NE): Walkable; some small parks, housing - $$$$$; old and new Dallas money, professors; grocery stores - Whole Foods, Tom Thumb, Wild Oats ; nearby areas with restaurants, groceries, etc - Snyder Plaza near SMU, Lover's Lane, Preston Center, North Park Mall
Greenway Park (E) - Located west of Highland Park, east of Love Field, north of Mockingbird; houses built in early-to-mid-1900's with fronts on wide greenbelts - goal was to create a close community; Walkable; lots of small parks, housing - $$$$$; old and new Dallas money; grocery stores - Whole Foods (SE), Tom Thumb (W); nearby areas with restaurants, groceries, etc - Inwood Village (N), Lover's Lane (N)
Bluffview (E): somewhat walkable; housing - $$$$$; grocery stores - Tom Thumb ; nearby areas with restaurants, groceries, etc - Lover's Lane (S)
Stephens Park (Oak Cliff): somewhat walkable; Stephen Park was developed by partners that eventually split and one went on to create Highland park; housing - $$$; architects, designers, artists, just folks; grocery stores - Tom Thumb; nearby areas with restaurants, groceries, etc - it's been awhile so perhaps chowhounders can help me out here.
Some links to explore for more info and neighborhoods:
I think you will find the people here gracious (when not driving, as they can get a bit aggressive), friendly and willing to be of assistance. All the best of luck to you!